8421572 has 24 divisors (see below), whose sum is σ = 15117312. Its totient is φ = 4104000.

The previous prime is 8421563. The next prime is 8421577. The reversal of 8421572 is 2751248.

It is not an unprimeable number, because it can be changed into a prime (8421577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43997 + ... + 44187.

It is an arithmetic number, because the mean of its divisors is an integer number (629888).

Almost surely, 2^8421572 is an apocalyptic number.

It is an amenable number.

8421572 is a deficient number, since it is larger than the sum of its proper divisors (6695740).

8421572 is a wasteful number, since it uses less digits than its factorization.

8421572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 417 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 8421572 is about 2901.9944865558. The cubic root of 8421572 is about 203.4531361236.

The spelling of 8421572 in words is "eight million, four hundred twenty-one thousand, five hundred seventy-two".