257212087 has 8 divisors (see below), whose sum is σ = 283488912. Its totient is φ = 231417600.

The previous prime is 257212079. The next prime is 257212097. The reversal of 257212087 is 780212752.

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

It is a cyclic number.

It is not a de Polignac number, because 257212087 - 2³ = 257212079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257212027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119464 + ... + 121597.

It is an arithmetic number, because the mean of its divisors is an integer number (35436114).

Almost surely, 2^257212087 is an apocalyptic number.

257212087 is a deficient number, since it is larger than the sum of its proper divisors (26276825).

257212087 is a wasteful number, since it uses less digits than its factorization.

257212087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241169.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 257212087 is about 16037.8329895282. The cubic root of 257212087 is about 635.9609621952.

The spelling of 257212087 in words is "two hundred fifty-seven million, two hundred twelve thousand, eighty-seven".