16460721 has 24 divisors (see below), whose sum is σ = 25159680. Its totient is φ = 10353600.

The previous prime is 16460713. The next prime is 16460753. The reversal of 16460721 is 12706461.

It is not a de Polignac number, because 16460721 - 2³ = 16460713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16460771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10720 + ... + 12158.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^16460721 is an apocalyptic number.

It is an amenable number.

16460721 is a deficient number, since it is larger than the sum of its proper divisors (8698959).

16460721 is a wasteful number, since it uses less digits than its factorization.

16460721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 16460721 is about 4057.1814107826. The cubic root of 16460721 is about 254.3799931608.

The spelling of 16460721 in words is "sixteen million, four hundred sixty thousand, seven hundred twenty-one".