251426426 has 8 divisors (see below), whose sum is σ = 377233524. Its totient is φ = 125681920.

The previous prime is 251426423. The next prime is 251426429. The reversal of 251426426 is 624624152.

It is an interprime number because it is at equal distance from previous prime (251426423) and next prime (251426429).

It can be written as a sum of positive squares in 2 ways, for example, as 251254201 + 172225 = 15851^2 + 415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×251426426² = 126430495382266952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251426392 and 251426401.

It is not an unprimeable number, because it can be changed into a prime (251426423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3815 + ... + 22746.

Almost surely, 2^251426426 is an apocalyptic number.

251426426 is a deficient number, since it is larger than the sum of its proper divisors (125807098).

251426426 is a wasteful number, since it uses less digits than its factorization.

251426426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31296.

The product of its digits is 23040, while the sum is 32.

The square root of 251426426 is about 15856.4316919034. The cubic root of 251426426 is about 631.1563761943.

The spelling of 251426426 in words is "two hundred fifty-one million, four hundred twenty-six thousand, four hundred twenty-six".