12621401 has 4 divisors (see below), whose sum is σ = 13592292. Its totient is φ = 11650512.

The previous prime is 12621391. The next prime is 12621419. The reversal of 12621401 is 10412621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 5736025 = 2624^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 12621401 - 2⁶ = 12621337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12621401.

It is not an unprimeable number, because it can be changed into a prime (12621421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485426 + ... + 485451.

It is an arithmetic number, because the mean of its divisors is an integer number (3398073).

Almost surely, 2^12621401 is an apocalyptic number.

It is an amenable number.

12621401 is a deficient number, since it is larger than the sum of its proper divisors (970891).

12621401 is an equidigital number, since it uses as much as digits as its factorization.

12621401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970890.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 12621401 is about 3552.6611152768. The cubic root of 12621401 is about 232.8283471128.

The spelling of 12621401 in words is "twelve million, six hundred twenty-one thousand, four hundred one".