251253425 has 6 divisors (see below), whose sum is σ = 311554278. Its totient is φ = 201002720.

The previous prime is 251253413. The next prime is 251253427. The reversal of 251253425 is 524352152.

It can be written as a sum of positive squares in 3 ways, for example, as 4857616 + 246395809 = 2204^2 + 15697^2 .

It is not a de Polignac number, because 251253425 - 2²⁰ = 250204849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251253427) 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 5 ways as a sum of consecutive naturals, for example, 5025044 + ... + 5025093.

It is an arithmetic number, because the mean of its divisors is an integer number (51925713).

Almost surely, 2^251253425 is an apocalyptic number.

251253425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251253425 is a deficient number, since it is larger than the sum of its proper divisors (60300853).

251253425 is a wasteful number, since it uses less digits than its factorization.

251253425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050147 (or 10050142 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 251253425 is about 15850.9755220302. The cubic root of 251253425 is about 631.0115813671.

The spelling of 251253425 in words is "two hundred fifty-one million, two hundred fifty-three thousand, four hundred twenty-five".