12641131 has 4 divisors (see below), whose sum is σ = 12681832. Its totient is φ = 12600432.

The previous prime is 12641119. The next prime is 12641147. The reversal of 12641131 is 13114621.

12641131 = 1449² + 1450² + ... + 1454².

12641131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13114621 = 13 ⋅1008817.

It is a cyclic number.

It is not a de Polignac number, because 12641131 - 2⁷ = 12641003 is a prime.

It is a super-2 number, since 2×12641131² = 319596385918322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12641099 and 12641108.

It is not an unprimeable number, because it can be changed into a prime (12641171) 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, 19881 + ... + 20506.

It is an arithmetic number, because the mean of its divisors is an integer number (3170458).

Almost surely, 2^12641131 is an apocalyptic number.

12641131 is a deficient number, since it is larger than the sum of its proper divisors (40701).

12641131 is an equidigital number, since it uses as much as digits as its factorization.

12641131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40700.

The product of its digits is 144, while the sum is 19.

The square root of 12641131 is about 3555.4368226703. The cubic root of 12641131 is about 232.9496044310.

Adding to 12641131 its reverse (13114621), we get a palindrome (25755752).

The spelling of 12641131 in words is "twelve million, six hundred forty-one thousand, one hundred thirty-one".