257701345 has 8 divisors (see below), whose sum is σ = 337354560. Its totient is φ = 187419120.

The previous prime is 257701343. The next prime is 257701349. The reversal of 257701345 is 543107752.

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

It is not a de Polignac number, because 257701345 - 2¹ = 257701343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257701345.

It is not an unprimeable number, because it can be changed into a prime (257701343) 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, 2342685 + ... + 2342794.

It is an arithmetic number, because the mean of its divisors is an integer number (42169320).

Almost surely, 2^257701345 is an apocalyptic number.

It is an amenable number.

257701345 is a deficient number, since it is larger than the sum of its proper divisors (79653215).

257701345 is a wasteful number, since it uses less digits than its factorization.

257701345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685495.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 257701345 is about 16053.0789881568. The cubic root of 257701345 is about 636.3639395144.

The spelling of 257701345 in words is "two hundred fifty-seven million, seven hundred one thousand, three hundred forty-five".