257420451 has 8 divisors (see below), whose sum is σ = 343398160. Its totient is φ = 171528192.

The previous prime is 257420431. The next prime is 257420453. The reversal of 257420451 is 154024752.

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

It is not a de Polignac number, because 257420451 - 2⁵ = 257420419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257420453) 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, 13966 + ... + 26643.

It is an arithmetic number, because the mean of its divisors is an integer number (42924770).

Almost surely, 2^257420451 is an apocalyptic number.

257420451 is a deficient number, since it is larger than the sum of its proper divisors (85977709).

257420451 is a wasteful number, since it uses less digits than its factorization.

257420451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42725.

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 257420451 is about 16044.3276892489. The cubic root of 257420451 is about 636.1326436089.

The spelling of 257420451 in words is "two hundred fifty-seven million, four hundred twenty thousand, four hundred fifty-one".