8472621 has 4 divisors (see below), whose sum is σ = 11296832. Its totient is φ = 5648412.

The previous prime is 8472617. The next prime is 8472623. The reversal of 8472621 is 1262748.

8472621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8472621 - 2² = 8472617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8472623) 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, 1412101 + ... + 1412106.

It is an arithmetic number, because the mean of its divisors is an integer number (2824208).

Almost surely, 2^8472621 is an apocalyptic number.

It is an amenable number.

8472621 is a deficient number, since it is larger than the sum of its proper divisors (2824211).

8472621 is a wasteful number, since it uses less digits than its factorization.

8472621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824210.

The product of its digits is 5376, while the sum is 30.

The square root of 8472621 is about 2910.7767004702. The cubic root of 8472621 is about 203.8633985539.

The spelling of 8472621 in words is "eight million, four hundred seventy-two thousand, six hundred twenty-one".