12946531 has 4 divisors (see below), whose sum is σ = 13942432. Its totient is φ = 11950632.

The previous prime is 12946519. The next prime is 12946603. The reversal of 12946531 is 13564921.

12946531 is nontrivially palindromic in base 15.

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 12946531 - 2⁹ = 12946019 is a prime.

It is a super-2 number, since 2×12946531² = 335225329867922, 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 = 12946493 and 12946502.

It is not an unprimeable number, because it can be changed into a prime (12946931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497931 + ... + 497956.

It is an arithmetic number, because the mean of its divisors is an integer number (3485608).

Almost surely, 2^12946531 is an apocalyptic number.

12946531 is a deficient number, since it is larger than the sum of its proper divisors (995901).

12946531 is an equidigital number, since it uses as much as digits as its factorization.

12946531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995900.

The product of its digits is 6480, while the sum is 31.

The square root of 12946531 is about 3598.1288192615. The cubic root of 12946531 is about 234.8106578072.

The spelling of 12946531 in words is "twelve million, nine hundred forty-six thousand, five hundred thirty-one".