257002 has 16 divisors (see below), whose sum is σ = 415872. Its totient is φ = 118800.

The previous prime is 256981. The next prime is 257003. The reversal of 257002 is 200752.

It is a happy number.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (257003) by changing a digit.

257002 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 7 ways as a sum of consecutive naturals, for example, 1627 + ... + 1777.

It is an arithmetic number, because the mean of its divisors is an integer number (25992).

2²⁵⁷⁰⁰² is an apocalyptic number.

257002 is a deficient number, since it is larger than the sum of its proper divisors (158870).

257002 is a wasteful number, since it uses less digits than its factorization.

257002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 257002 is about 506.9536467962. The cubic root of 257002 is about 63.5787767220.

Adding to 257002 its reverse (200752), we get a palindrome (457754).

The spelling of 257002 in words is "two hundred fifty-seven thousand, two".