Base | Representation |
---|---|
bin | 1111001011111011001001 |
3 | 21111020220111 |
4 | 33023323021 |
5 | 2004343001 |
6 | 221154321 |
7 | 45560263 |
oct | 17137311 |
9 | 7436814 |
10 | 3981001 |
11 | 2279a92 |
12 | 13bb9a1 |
13 | a9502b |
14 | 758b33 |
15 | 539851 |
hex | 3cbec9 |
3981001 has 4 divisors (see below), whose sum is σ = 4154112. Its totient is φ = 3807892.
The previous prime is 3980987. The next prime is 3981017. The reversal of 3981001 is 1001893.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001893 = 83 ⋅12071.
It is a cyclic number.
It is not a de Polignac number, because 3981001 - 213 = 3972809 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3981071) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86521 + ... + 86566.
It is an arithmetic number, because the mean of its divisors is an integer number (1038528).
Almost surely, 23981001 is an apocalyptic number.
It is an amenable number.
3981001 is a deficient number, since it is larger than the sum of its proper divisors (173111).
3981001 is a wasteful number, since it uses less digits than its factorization.
3981001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 173110.
The product of its (nonzero) digits is 216, while the sum is 22.
The square root of 3981001 is about 1995.2445965345. The cubic root of 3981001 is about 158.4883809612.
Adding to 3981001 its reverse (1001893), we get a palindrome (4982894).
The spelling of 3981001 in words is "three million, nine hundred eighty-one thousand, one".
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