251411042 has 4 divisors (see below), whose sum is σ = 377116566. Its totient is φ = 125705520.

The previous prime is 251411033. The next prime is 251411053. The reversal of 251411042 is 240114152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 166384201 + 85026841 = 12899^2 + 9221^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62852759 + ... + 62852762.

Almost surely, 2^251411042 is an apocalyptic number.

251411042 is a deficient number, since it is larger than the sum of its proper divisors (125705524).

251411042 is a wasteful number, since it uses less digits than its factorization.

251411042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125705523.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 251411042 is about 15855.9465816456. The cubic root of 251411042 is about 631.1435031007.

Adding to 251411042 its reverse (240114152), we get a palindrome (491525194).

It can be divided in two parts, 2514110 and 42, that added together give a palindrome (2514152).

The spelling of 251411042 in words is "two hundred fifty-one million, four hundred eleven thousand, forty-two".