253618 has 8 divisors (see below), whose sum is σ = 383148. Its totient is φ = 125904.

The previous prime is 253613. The next prime is 253633. The reversal of 253618 is 816352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 182329 + 71289 = 427^2 + 267^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 253592 and 253601.

It is not an unprimeable number, because it can be changed into a prime (253613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 712.

2²⁵³⁶¹⁸ is an apocalyptic number.

253618 is a deficient number, since it is larger than the sum of its proper divisors (129530).

253618 is a wasteful number, since it uses less digits than its factorization.

253618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its digits is 1440, while the sum is 25.

The square root of 253618 is about 503.6050039465. The cubic root of 253618 is about 63.2984911463.

The spelling of 253618 in words is "two hundred fifty-three thousand, six hundred eighteen".