257802142 has 8 divisors (see below), whose sum is σ = 416449656. Its totient is φ = 118985592.

The previous prime is 257802133. The next prime is 257802143. The reversal of 257802142 is 241208752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257802143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4957708 + ... + 4957759.

It is an arithmetic number, because the mean of its divisors is an integer number (52056207).

Almost surely, 2^257802142 is an apocalyptic number.

257802142 is a deficient number, since it is larger than the sum of its proper divisors (158647514).

257802142 is a wasteful number, since it uses less digits than its factorization.

257802142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9915482.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 257802142 is about 16056.2181724091. The cubic root of 257802142 is about 636.4468975794.

The spelling of 257802142 in words is "two hundred fifty-seven million, eight hundred two thousand, one hundred forty-two".