253869 has 24 divisors (see below), whose sum is σ = 432288. Its totient is φ = 131040.

The previous prime is 253867. The next prime is 253871. The reversal of 253869 is 968352.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (253867) and next prime (253871).

It is not a de Polignac number, because 253869 - 2¹ = 253867 is a prime.

It is a super-2 number, since 2×253869² = 128898938322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1539 + ... + 1695.

It is an arithmetic number, because the mean of its divisors is an integer number (18012).

2²⁵³⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

253869 is a deficient number, since it is larger than the sum of its proper divisors (178419).

253869 is a wasteful number, since it uses less digits than its factorization.

253869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 178 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 253869 is about 503.8541455620. The cubic root of 253869 is about 63.3193659565.

Adding to 253869 its reverse (968352), we get a palindrome (1222221).

The spelling of 253869 in words is "two hundred fifty-three thousand, eight hundred sixty-nine".