16425725 has 6 divisors (see below), whose sum is σ = 20367930. Its totient is φ = 13140560.

The previous prime is 16425713. The next prime is 16425737. The reversal of 16425725 is 52752461.

It is an interprime number because it is at equal distance from previous prime (16425713) and next prime (16425737).

It can be written as a sum of positive squares in 3 ways, for example, as 2393209 + 14032516 = 1547^2 + 3746^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16425725 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16425691 and 16425700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 328490 + ... + 328539.

It is an arithmetic number, because the mean of its divisors is an integer number (3394655).

Almost surely, 2^16425725 is an apocalyptic number.

It is an amenable number.

16425725 is a deficient number, since it is larger than the sum of its proper divisors (3942205).

16425725 is an equidigital number, since it uses as much as digits as its factorization.

16425725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657039 (or 657034 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 16425725 is about 4052.8662696911. The cubic root of 16425725 is about 254.1995920199.

The spelling of 16425725 in words is "sixteen million, four hundred twenty-five thousand, seven hundred twenty-five".