251425434 has 32 divisors (see below), whose sum is σ = 556174080. Its totient is φ = 75269952.

The previous prime is 251425417. The next prime is 251425439. The reversal of 251425434 is 434524152.

It is not an unprimeable number, because it can be changed into a prime (251425439) 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 15 ways as a sum of consecutive naturals, for example, 40674 + ... + 46445.

It is an arithmetic number, because the mean of its divisors is an integer number (17380440).

Almost surely, 2^251425434 is an apocalyptic number.

251425434 is an abundant number, since it is smaller than the sum of its proper divisors (304748646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251425434 is a wasteful number, since it uses less digits than its factorization.

251425434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87174.

The product of its digits is 19200, while the sum is 30.

The square root of 251425434 is about 15856.4004111904. The cubic root of 251425434 is about 631.1555461198.

Adding to 251425434 its reverse (434524152), we get a palindrome (685949586).

The spelling of 251425434 in words is "two hundred fifty-one million, four hundred twenty-five thousand, four hundred thirty-four".