12621004 has 48 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 5269760.

The previous prime is 12620981. The next prime is 12621017. The reversal of 12621004 is 40012621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34977 + ... + 35335.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^12621004 is an apocalyptic number.

It is an amenable number.

12621004 is an abundant number, since it is smaller than the sum of its proper divisors (13506356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12621004 is a wasteful number, since it uses less digits than its factorization.

12621004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12621004 is about 3552.6052412279. The cubic root of 12621004 is about 232.8259059199.

Adding to 12621004 its reverse (40012621), we get a palindrome (52633625).

The spelling of 12621004 in words is "twelve million, six hundred twenty-one thousand, four".