251426425 has 12 divisors (see below), whose sum is σ = 314985916. Its totient is φ = 199065600.

The previous prime is 251426423. The next prime is 251426429. The reversal of 251426425 is 524624152.

It can be written as a sum of positive squares in 6 ways, for example, as 20720704 + 230705721 = 4552^2 + 15189^2 .

It is not a de Polignac number, because 251426425 - 2¹ = 251426423 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 49416 + ... + 54265.

Almost surely, 2^251426425 is an apocalyptic number.

251426425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251426425 is a deficient number, since it is larger than the sum of its proper divisors (63559491).

251426425 is a wasteful number, since it uses less digits than its factorization.

251426425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103788 (or 103783 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 251426425 is about 15856.4316603705. The cubic root of 251426425 is about 631.1563753575.

The spelling of 251426425 in words is "two hundred fifty-one million, four hundred twenty-six thousand, four hundred twenty-five".