13821725 has 12 divisors (see below), whose sum is σ = 17302464. Its totient is φ = 10951920.

The previous prime is 13821707. The next prime is 13821733. The reversal of 13821725 is 52712831.

It is a de Polignac number, because none of the positive numbers 2^k-13821725 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92 + ... + 5258.

It is an arithmetic number, because the mean of its divisors is an integer number (1441872).

Almost surely, 2^13821725 is an apocalyptic number.

It is an amenable number.

13821725 is a deficient number, since it is larger than the sum of its proper divisors (3480739).

13821725 is a wasteful number, since it uses less digits than its factorization.

13821725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284 (or 5279 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 13821725 is about 3717.7580609825. The cubic root of 13821725 is about 239.9868337685.

The spelling of 13821725 in words is "thirteen million, eight hundred twenty-one thousand, seven hundred twenty-five".