16642525 has 12 divisors (see below), whose sum is σ = 20757600. Its totient is φ = 13236080.

The previous prime is 16642519. The next prime is 16642529. The reversal of 16642525 is 52524661.

It is not a de Polignac number, because 16642525 - 2³ = 16642517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642529) 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, 2616 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (1729800).

Almost surely, 2^16642525 is an apocalyptic number.

It is an amenable number.

16642525 is a deficient number, since it is larger than the sum of its proper divisors (4115075).

16642525 is a wasteful number, since it uses less digits than its factorization.

16642525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908 (or 3903 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 16642525 is about 4079.5250949099. The cubic root of 16642525 is about 255.3130846213.

The spelling of 16642525 in words is "sixteen million, six hundred forty-two thousand, five hundred twenty-five".