5131239 has 4 divisors (see below), whose sum is σ = 6841656. Its totient is φ = 3420824.

The previous prime is 5131237. The next prime is 5131249. The reversal of 5131239 is 9321315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5131239 - 2¹ = 5131237 is a prime.

It is a super-2 number, since 2×5131239² = 52659227350242, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5131237) 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, 855204 + ... + 855209.

It is an arithmetic number, because the mean of its divisors is an integer number (1710414).

Almost surely, 2^5131239 is an apocalyptic number.

5131239 is a deficient number, since it is larger than the sum of its proper divisors (1710417).

5131239 is a wasteful number, since it uses less digits than its factorization.

5131239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710416.

The product of its digits is 810, while the sum is 24.

The square root of 5131239 is about 2265.2238300000. The cubic root of 5131239 is about 172.4807960138.

The spelling of 5131239 in words is "five million, one hundred thirty-one thousand, two hundred thirty-nine".