257498 has 4 divisors (see below), whose sum is σ = 386250. Its totient is φ = 128748.

The previous prime is 257497. The next prime is 257501. The reversal of 257498 is 894752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 253009 + 4489 = 503^2 + 67^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 257498.

It is not an unprimeable number, because it can be changed into a prime (257497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64373 + ... + 64376.

2²⁵⁷⁴⁹⁸ is an apocalyptic number.

257498 is a deficient number, since it is larger than the sum of its proper divisors (128752).

257498 is a wasteful number, since it uses less digits than its factorization.

257498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128751.

The product of its digits is 20160, while the sum is 35.

The square root of 257498 is about 507.4426075922. The cubic root of 257498 is about 63.6196516412.

It can be divided in two parts, 2574 and 98, that multiplied together give a palindrome (252252).

The spelling of 257498 in words is "two hundred fifty-seven thousand, four hundred ninety-eight".