12131451 has 10 divisors (see below), whose sum is σ = 18122412. Its totient is φ = 8087580.

The previous prime is 12131437. The next prime is 12131473. The reversal of 12131451 is 15413121.

12131451 is a `hidden beast` number, since 1 + 213 + 1 + 451 = 666.

It is not a de Polignac number, because 12131451 - 2¹⁵ = 12098683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12132451) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74805 + ... + 74966.

Almost surely, 2^12131451 is an apocalyptic number.

12131451 is a deficient number, since it is larger than the sum of its proper divisors (5990961).

12131451 is an equidigital number, since it uses as much as digits as its factorization.

12131451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149783 (or 149774 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 12131451 is about 3483.0232557363. The cubic root of 12131451 is about 229.7757802260.

Adding to 12131451 its reverse (15413121), we get a palindrome (27544572).

The spelling of 12131451 in words is "twelve million, one hundred thirty-one thousand, four hundred fifty-one".