14523721 has 9 divisors (see below), whose sum is σ = 15073191. Its totient is φ = 13993992.

The previous prime is 14523683. The next prime is 14523737. The reversal of 14523721 is 12732541.

It is a happy number.

The square root of 14523721 is 3811.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 1527696 = 3605^2 + 1236^2 .

It is not a de Polignac number, because 14523721 - 2¹¹ = 14521673 is a prime.

It is a Duffinian number.

Its product of digits (1680) is a multiple of the sum of its prime divisors (140).

It is not an unprimeable number, because it can be changed into a prime (14523521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 140956 + ... + 141058.

It is an arithmetic number, because the mean of its divisors is an integer number (1674799).

Almost surely, 2^14523721 is an apocalyptic number.

14523721 is the 3811-st square number.

14523721 is the 1906-th centered octagonal number.

It is an amenable number.

14523721 is a deficient number, since it is larger than the sum of its proper divisors (549470).

14523721 is an frugal number, since it uses more digits than its factorization.

14523721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 140 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The cubic root of 14523721 is about 243.9828495067.

Multiplying 14523721 by its sum of digits (25), we get a square (363093025 = 19055²).

The spelling of 14523721 in words is "fourteen million, five hundred twenty-three thousand, seven hundred twenty-one".