16539725 has 12 divisors (see below), whose sum is σ = 21716244. Its totient is φ = 12453120.

The previous prime is 16539713. The next prime is 16539727. The reversal of 16539725 is 52793561.

It is a happy number.

16539725 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 770884 + 15768841 = 878^2 + 3971^2 .

It is not a de Polignac number, because 16539725 - 2¹⁰ = 16538701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19034 + ... + 19883.

It is an arithmetic number, because the mean of its divisors is an integer number (1809687).

Almost surely, 2^16539725 is an apocalyptic number.

It is an amenable number.

16539725 is a deficient number, since it is larger than the sum of its proper divisors (5176519).

16539725 is a wasteful number, since it uses less digits than its factorization.

16539725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38944 (or 38939 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 16539725 is about 4066.9060721880. The cubic root of 16539725 is about 254.7863133582.

The spelling of 16539725 in words is "sixteen million, five hundred thirty-nine thousand, seven hundred twenty-five".