15421073 has 4 divisors (see below), whose sum is σ = 15428928. Its totient is φ = 15413220.

The previous prime is 15421061. The next prime is 15421093. The reversal of 15421073 is 37012451.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15421073 - 2⁸ = 15420817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15421013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (3857232).

Almost surely, 2^15421073 is an apocalyptic number.

It is an amenable number.

15421073 is a deficient number, since it is larger than the sum of its proper divisors (7855).

15421073 is an equidigital number, since it uses as much as digits as its factorization.

15421073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7854.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 15421073 is about 3926.9674050086. The cubic root of 15421073 is about 248.9076231366.

The spelling of 15421073 in words is "fifteen million, four hundred twenty-one thousand, seventy-three".