131125499 has 4 divisors (see below), whose sum is σ = 133082664. Its totient is φ = 129168336.

The previous prime is 131125487. The next prime is 131125529. The reversal of 131125499 is 994521131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994521131 = 17 ⋅58501243.

It is a cyclic number.

It is not a de Polignac number, because 131125499 - 2⁴ = 131125483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131125409) 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, 978482 + ... + 978615.

It is an arithmetic number, because the mean of its divisors is an integer number (33270666).

Almost surely, 2^131125499 is an apocalyptic number.

131125499 is a deficient number, since it is larger than the sum of its proper divisors (1957165).

131125499 is an equidigital number, since it uses as much as digits as its factorization.

131125499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957164.

The product of its digits is 9720, while the sum is 35.

The square root of 131125499 is about 11451.0042791015. The cubic root of 131125499 is about 508.0374388573.

The spelling of 131125499 in words is "one hundred thirty-one million, one hundred twenty-five thousand, four hundred ninety-nine".