12361531 has 8 divisors (see below), whose sum is σ = 15214304. Its totient is φ = 9780480.

The previous prime is 12361513. The next prime is 12361537. The reversal of 12361531 is 13516321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12361531 - 2⁷ = 12361403 is a prime.

It is a super-2 number, since 2×12361531² = 305614897327922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12361537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67830 + ... + 68011.

It is an arithmetic number, because the mean of its divisors is an integer number (1901788).

Almost surely, 2^12361531 is an apocalyptic number.

12361531 is a deficient number, since it is larger than the sum of its proper divisors (2852773).

12361531 is a wasteful number, since it uses less digits than its factorization.

12361531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135861.

The product of its digits is 540, while the sum is 22.

The square root of 12361531 is about 3515.8968983746. The cubic root of 12361531 is about 231.2193028647.

Adding to 12361531 its reverse (13516321), we get a palindrome (25877852).

The spelling of 12361531 in words is "twelve million, three hundred sixty-one thousand, five hundred thirty-one".