257250161 has 8 divisors (see below), whose sum is σ = 295048704. Its totient is φ = 219713760.

The previous prime is 257250157. The next prime is 257250179. The reversal of 257250161 is 161052752.

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

It is not a de Polignac number, because 257250161 - 2² = 257250157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257250361) 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, 63425 + ... + 67358.

It is an arithmetic number, because the mean of its divisors is an integer number (36881088).

Almost surely, 2^257250161 is an apocalyptic number.

It is an amenable number.

257250161 is a deficient number, since it is larger than the sum of its proper divisors (37798543).

257250161 is a wasteful number, since it uses less digits than its factorization.

257250161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131071.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 257250161 is about 16039.0199513561. The cubic root of 257250161 is about 635.9923401699.

The spelling of 257250161 in words is "two hundred fifty-seven million, two hundred fifty thousand, one hundred sixty-one".