257601945 has 8 divisors (see below), whose sum is σ = 412163136. Its totient is φ = 137387696.

The previous prime is 257601941. The next prime is 257601947. The reversal of 257601945 is 549106752.

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 257601945 - 2² = 257601941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257601941) 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, 8586717 + ... + 8586746.

It is an arithmetic number, because the mean of its divisors is an integer number (51520392).

Almost surely, 2^257601945 is an apocalyptic number.

It is an amenable number.

257601945 is a deficient number, since it is larger than the sum of its proper divisors (154561191).

257601945 is a wasteful number, since it uses less digits than its factorization.

257601945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17173471.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 257601945 is about 16049.9827102711. The cubic root of 257601945 is about 636.2821100228.

The spelling of 257601945 in words is "two hundred fifty-seven million, six hundred one thousand, nine hundred forty-five".