16539925 has 12 divisors (see below), whose sum is σ = 21064996. Its totient is φ = 12873600.

The previous prime is 16539871. The next prime is 16539959. The reversal of 16539925 is 52993561.

It is a happy number.

16539925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 7569 + 16532356 = 87^2 + 4066^2 .

It is not a de Polignac number, because 16539925 - 2⁷ = 16539797 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 8016 + ... + 9865.

Almost surely, 2^16539925 is an apocalyptic number.

It is an amenable number.

16539925 is a deficient number, since it is larger than the sum of its proper divisors (4525071).

16539925 is a wasteful number, since it uses less digits than its factorization.

16539925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17928 (or 17923 counting only the distinct ones).

The product of its digits is 72900, while the sum is 40.

The square root of 16539925 is about 4066.9306608301. The cubic root of 16539925 is about 254.7873403212.

The spelling of 16539925 in words is "sixteen million, five hundred thirty-nine thousand, nine hundred twenty-five".