251406142 has 16 divisors (see below), whose sum is σ = 408556512. Its totient is φ = 115336800.

The previous prime is 251406131. The next prime is 251406151. The reversal of 251406142 is 241604152.

It is a happy number.

It is a congruent number.

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, 24609 + ... + 33292.

It is an arithmetic number, because the mean of its divisors is an integer number (25534782).

Almost surely, 2^251406142 is an apocalyptic number.

251406142 is a deficient number, since it is larger than the sum of its proper divisors (157150370).

251406142 is a wasteful number, since it uses less digits than its factorization.

251406142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58083.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 251406142 is about 15855.7920647314. The cubic root of 251406142 is about 631.1394027461.

The spelling of 251406142 in words is "two hundred fifty-one million, four hundred six thousand, one hundred forty-two".