251598942 has 24 divisors (see below), whose sum is σ = 623007216. Its totient is φ = 71885376.

The previous prime is 251598899. The next prime is 251598947. The reversal of 251598942 is 249895152.

It is a happy number.

251598942 is a `hidden beast` number, since 2 + 51 + 598 + 9 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251598947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 998283 + ... + 998534.

It is an arithmetic number, because the mean of its divisors is an integer number (25958634).

Almost surely, 2^251598942 is an apocalyptic number.

251598942 is an abundant number, since it is smaller than the sum of its proper divisors (371408274).

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

251598942 is a wasteful number, since it uses less digits than its factorization.

251598942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996832 (or 1996829 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 251598942 is about 15861.8706967369. The cubic root of 251598942 is about 631.3006989702.

The spelling of 251598942 in words is "two hundred fifty-one million, five hundred ninety-eight thousand, nine hundred forty-two".