257002287 has 8 divisors (see below), whose sum is σ = 343787136. Its totient is φ = 170776152.

The previous prime is 257002241. The next prime is 257002297. The reversal of 257002287 is 782200752.

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

It is not a de Polignac number, because 257002287 - 2¹² = 256998191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257002217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138603 + ... + 140444.

It is an arithmetic number, because the mean of its divisors is an integer number (42973392).

Almost surely, 2^257002287 is an apocalyptic number.

257002287 is a deficient number, since it is larger than the sum of its proper divisors (86784849).

257002287 is a wasteful number, since it uses less digits than its factorization.

257002287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279357.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 257002287 is about 16031.2908712929. The cubic root of 257002287 is about 635.7880038859.

The spelling of 257002287 in words is "two hundred fifty-seven million, two thousand, two hundred eighty-seven".