| Base | Representation |
|---|---|
| bin | 11001010111000… |
| … | …111100101011101 |
| 3 | 1002122122011121211 |
| 4 | 121113013211131 |
| 5 | 1332411201111 |
| 6 | 110115424421 |
| 7 | 13354416622 |
| oct | 3127074535 |
| 9 | 1078564554 |
| 10 | 425490781 |
| 11 | 1a91a6581 |
| 12 | ba5b5111 |
| 13 | 6a1c7cc1 |
| 14 | 4071c349 |
| 15 | 2754b521 |
| hex | 195c795d |
425490781 has 4 divisors (see below), whose sum is σ = 425642364. Its totient is φ = 425339200.
The previous prime is 425490757. The next prime is 425490811. The reversal of 425490781 is 187094524.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 115906756 + 309584025 = 10766^2 + 17595^2 .
It is a 3-Lehmer number, since φ(425490781) divides (425490781-1)3.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-425490781 is a prime.
It is a super-2 number, since 2×4254907812 = 362084809431979922, which contains 22 as substring.
It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a deceptive number, since it divides R425490780.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (425490701) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71500 + ... + 77221.
It is an arithmetic number, because the mean of its divisors is an integer number (106410591).
Almost surely, 2425490781 is an apocalyptic number.
It is an amenable number.
425490781 is a deficient number, since it is larger than the sum of its proper divisors (151583).
425490781 is a wasteful number, since it uses less digits than its factorization.
425490781 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 151582.
The product of its (nonzero) digits is 80640, while the sum is 40.
The square root of 425490781 is about 20627.4278813428. The cubic root of 425490781 is about 752.1365925535.
The spelling of 425490781 in words is "four hundred twenty-five million, four hundred ninety thousand, seven hundred eighty-one".
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