15314721 has 16 divisors (see below), whose sum is σ = 21159360. Its totient is φ = 9846720.

The previous prime is 15314701. The next prime is 15314737. The reversal of 15314721 is 12741351.

It is not a de Polignac number, because 15314721 - 2⁶ = 15314657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15314691 and 15314700.

It is not an unprimeable number, because it can be changed into a prime (15314701) 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 15 ways as a sum of consecutive naturals, for example, 8910 + ... + 10488.

It is an arithmetic number, because the mean of its divisors is an integer number (1322460).

Almost surely, 2^15314721 is an apocalyptic number.

It is an amenable number.

15314721 is a deficient number, since it is larger than the sum of its proper divisors (5844639).

15314721 is a wasteful number, since it uses less digits than its factorization.

15314721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696.

The product of its digits is 840, while the sum is 24.

The square root of 15314721 is about 3913.4027393050. The cubic root of 15314721 is about 248.3341024655.

The spelling of 15314721 in words is "fifteen million, three hundred fourteen thousand, seven hundred twenty-one".