16387725 has 24 divisors (see below), whose sum is σ = 27676800. Its totient is φ = 8552320.

The previous prime is 16387717. The next prime is 16387727. The reversal of 16387725 is 52778361.

It is not a de Polignac number, because 16387725 - 2³ = 16387717 is a prime.

Its product of digits (70560) is a multiple of the sum of its prime divisors (4704).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16387727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1201 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (1153200).

Almost surely, 2^16387725 is an apocalyptic number.

16387725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16387725 is a deficient number, since it is larger than the sum of its proper divisors (11289075).

16387725 is a wasteful number, since it uses less digits than its factorization.

16387725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709 (or 4704 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 16387725 is about 4048.1755149697. The cubic root of 16387725 is about 254.0034151276.

The spelling of 16387725 in words is "sixteen million, three hundred eighty-seven thousand, seven hundred twenty-five".