253642 has 8 divisors (see below), whose sum is σ = 392832. Its totient is φ = 122700.

The previous prime is 253639. The next prime is 253651. The reversal of 253642 is 246352.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984 + ... + 2107.

It is an arithmetic number, because the mean of its divisors is an integer number (49104).

253642 is a Friedman number, since it can be written as 62*(4^(3*2)-5), using all its digits and the basic arithmetic operations.

2²⁵³⁶⁴² is an apocalyptic number.

253642 is a deficient number, since it is larger than the sum of its proper divisors (139190).

253642 is a wasteful number, since it uses less digits than its factorization.

253642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124.

The product of its digits is 1440, while the sum is 22.

The square root of 253642 is about 503.6288315814. The cubic root of 253642 is about 63.3004877394.

Adding to 253642 its reverse (246352), we get a palindrome (499994).

The spelling of 253642 in words is "two hundred fifty-three thousand, six hundred forty-two".