257454128 has 10 divisors (see below), whose sum is σ = 498817404. Its totient is φ = 128727056.

The previous prime is 257454121. The next prime is 257454139. The reversal of 257454128 is 821454752.

It is a junction number, because it is equal to n+sod(n) for n = 257454091 and 257454100.

It is not an unprimeable number, because it can be changed into a prime (257454121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8045426 + ... + 8045457.

Almost surely, 2^257454128 is an apocalyptic number.

It is an amenable number.

257454128 is a deficient number, since it is larger than the sum of its proper divisors (241363276).

257454128 is a wasteful number, since it uses less digits than its factorization.

257454128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16090891 (or 16090885 counting only the distinct ones).

The product of its digits is 89600, while the sum is 38.

The square root of 257454128 is about 16045.3771535605. The cubic root of 257454128 is about 636.1603830585.

The spelling of 257454128 in words is "two hundred fifty-seven million, four hundred fifty-four thousand, one hundred twenty-eight".