251434042 has 16 divisors (see below), whose sum is σ = 380671200. Its totient is φ = 124547760.

The previous prime is 251434033. The next prime is 251434069. The reversal of 251434042 is 240434152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 251433998 and 251434016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229917 + ... + 231007.

It is an arithmetic number, because the mean of its divisors is an integer number (23791950).

Almost surely, 2^251434042 is an apocalyptic number.

251434042 is a deficient number, since it is larger than the sum of its proper divisors (129237158).

251434042 is a wasteful number, since it uses less digits than its factorization.

251434042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 251434042 is about 15856.6718449995. The cubic root of 251434042 is about 631.1627489511.

Adding to 251434042 its reverse (240434152), we get a palindrome (491868194).

The spelling of 251434042 in words is "two hundred fifty-one million, four hundred thirty-four thousand, forty-two".