16403725 has 24 divisors (see below), whose sum is σ = 23201640. Its totient is φ = 11397120.

The previous prime is 16403671. The next prime is 16403747. The reversal of 16403725 is 52730461.

It can be written as a sum of positive squares in 12 ways, for example, as 10634121 + 5769604 = 3261^2 + 2402^2 .

It is not a de Polignac number, because 16403725 - 2¹⁵ = 16370957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16403693 and 16403702.

It is a congruent number.

It is an unprimeable number.

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, 4041 + ... + 7009.

It is an arithmetic number, because the mean of its divisors is an integer number (966735).

Almost surely, 2^16403725 is an apocalyptic number.

It is an amenable number.

16403725 is a deficient number, since it is larger than the sum of its proper divisors (6797915).

16403725 is a wasteful number, since it uses less digits than its factorization.

16403725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 16403725 is about 4050.1512317443. The cubic root of 16403725 is about 254.0860528483.

The spelling of 16403725 in words is "sixteen million, four hundred three thousand, seven hundred twenty-five".