12621031 has 4 divisors (see below), whose sum is σ = 12798864. Its totient is φ = 12443200.

The previous prime is 12621017. The next prime is 12621041. The reversal of 12621031 is 13012621.

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 12621031 - 2¹⁷ = 12489959 is a prime.

It is a super-2 number, since 2×12621031² = 318580847005922, 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 = 12620996 and 12621014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621041) 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, 88810 + ... + 88951.

It is an arithmetic number, because the mean of its divisors is an integer number (3199716).

Almost surely, 2^12621031 is an apocalyptic number.

12621031 is a deficient number, since it is larger than the sum of its proper divisors (177833).

12621031 is an equidigital number, since it uses as much as digits as its factorization.

12621031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177832.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12621031 is about 3552.6090412540. The cubic root of 12621031 is about 232.8260719473.

Adding to 12621031 its reverse (13012621), we get a palindrome (25633652).

The spelling of 12621031 in words is "twelve million, six hundred twenty-one thousand, thirty-one".