12621973 has 32 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 9123840.

The previous prime is 12621971. The next prime is 12621977. The reversal of 12621973 is 37912621.

It is a cyclic number.

It is not a de Polignac number, because 12621973 - 2¹ = 12621971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63328 + ... + 63526.

It is an arithmetic number, because the mean of its divisors is an integer number (529200).

Almost surely, 2^12621973 is an apocalyptic number.

12621973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12621973 is a deficient number, since it is larger than the sum of its proper divisors (4312427).

12621973 is a wasteful number, since it uses less digits than its factorization.

12621973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277.

The product of its digits is 4536, while the sum is 31.

The square root of 12621973 is about 3552.7416173992. The cubic root of 12621973 is about 232.8318643083.

The spelling of 12621973 in words is "twelve million, six hundred twenty-one thousand, nine hundred seventy-three".