257052685 has 8 divisors (see below), whose sum is σ = 309665016. Its totient is φ = 204840960.

The previous prime is 257052683. The next prime is 257052701. The reversal of 257052685 is 586250752.

It can be written as a sum of positive squares in 4 ways, for example, as 134861769 + 122190916 = 11613^2 + 11054^2 .

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

It is not a de Polignac number, because 257052685 - 2¹ = 257052683 is a prime.

It is a Duffinian number.

257052685 is a modest number, since divided by 52685 gives 2570 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257052683) 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, 98736 + ... + 101305.

It is an arithmetic number, because the mean of its divisors is an integer number (38708127).

Almost surely, 2^257052685 is an apocalyptic number.

It is an amenable number.

257052685 is a deficient number, since it is larger than the sum of its proper divisors (52612331).

257052685 is a wasteful number, since it uses less digits than its factorization.

257052685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200303.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 257052685 is about 16032.8626576791. The cubic root of 257052685 is about 635.8295603897.

It can be divided in two parts, 2570 and 52685, that added together give a palindrome (55255).

The spelling of 257052685 in words is "two hundred fifty-seven million, fifty-two thousand, six hundred eighty-five".