12724621 has 8 divisors (see below), whose sum is σ = 15661184. Its totient is φ = 10067760.

The previous prime is 12724583. The next prime is 12724627. The reversal of 12724621 is 12642721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12724621 - 2⁷ = 12724493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12724627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69825 + ... + 70006.

It is an arithmetic number, because the mean of its divisors is an integer number (1957648).

Almost surely, 2^12724621 is an apocalyptic number.

12724621 is the 2060-th hex number.

It is an amenable number.

12724621 is a deficient number, since it is larger than the sum of its proper divisors (2936563).

12724621 is a wasteful number, since it uses less digits than its factorization.

12724621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139851.

The product of its digits is 1344, while the sum is 25.

The square root of 12724621 is about 3567.1586732300. The cubic root of 12724621 is about 233.4613281884.

The spelling of 12724621 in words is "twelve million, seven hundred twenty-four thousand, six hundred twenty-one".