257487295 has 8 divisors (see below), whose sum is σ = 332752896. Its totient is φ = 190144416.

The previous prime is 257487281. The next prime is 257487319. The reversal of 257487295 is 592784752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257487295 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1980607 + ... + 1980736.

It is an arithmetic number, because the mean of its divisors is an integer number (41594112).

Almost surely, 2^257487295 is an apocalyptic number.

257487295 is a deficient number, since it is larger than the sum of its proper divisors (75265601).

257487295 is a wasteful number, since it uses less digits than its factorization.

257487295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961361.

The product of its digits is 1411200, while the sum is 49.

The square root of 257487295 is about 16046.4106578387. The cubic root of 257487295 is about 636.1877000613.

The spelling of 257487295 in words is "two hundred fifty-seven million, four hundred eighty-seven thousand, two hundred ninety-five".