253139 has 4 divisors (see below), whose sum is σ = 254856. Its totient is φ = 251424.

The previous prime is 253133. The next prime is 253153. The reversal of 253139 is 931352.

It is a happy number.

253139 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253139 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253139.

It is not an unprimeable number, because it can be changed into a prime (253133) 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, 614 + ... + 939.

It is an arithmetic number, because the mean of its divisors is an integer number (63714).

2²⁵³¹³⁹ is an apocalyptic number.

253139 is a deficient number, since it is larger than the sum of its proper divisors (1717).

253139 is a wasteful number, since it uses less digits than its factorization.

253139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716.

The product of its digits is 810, while the sum is 23.

The square root of 253139 is about 503.1292080569. The cubic root of 253139 is about 63.2586161040.

Subtracting from 253139 its sum of digits (23), we obtain a triangular number (253116 = T₇₁₁).

The spelling of 253139 in words is "two hundred fifty-three thousand, one hundred thirty-nine".