253402 has 16 divisors (see below), whose sum is σ = 417960. Its totient is φ = 114688.

The previous prime is 253387. The next prime is 253417. The reversal of 253402 is 204352.

It is an interprime number because it is at equal distance from previous prime (253387) and next prime (253417).

It can be written as a sum of positive squares in 4 ways, for example, as 251001 + 2401 = 501^2 + 49^2 .

It is an unprimeable number.

253402 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, 858 + ... + 1114.

2²⁵³⁴⁰² is an apocalyptic number.

253402 is a deficient number, since it is larger than the sum of its proper divisors (164558).

253402 is a wasteful number, since it uses less digits than its factorization.

253402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 253402 is about 503.3905044794. The cubic root of 253402 is about 63.2805161374.

Adding to 253402 its reverse (204352), we get a palindrome (457754).

The spelling of 253402 in words is "two hundred fifty-three thousand, four hundred two".