16404325 has 12 divisors (see below), whose sum is σ = 23247520. Its totient is φ = 11248560.

The previous prime is 16404307. The next prime is 16404329. The reversal of 16404325 is 52340461.

It is not a de Polignac number, because 16404325 - 2⁵ = 16404293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 16404325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16404329) 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, 46695 + ... + 47044.

Almost surely, 2^16404325 is an apocalyptic number.

It is an amenable number.

16404325 is a deficient number, since it is larger than the sum of its proper divisors (6843195).

16404325 is an equidigital number, since it uses as much as digits as its factorization.

16404325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93756 (or 93751 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 16404325 is about 4050.2253023752. The cubic root of 16404325 is about 254.0891507173.

Adding to 16404325 its reverse (52340461), we get a palindrome (68744786).

The spelling of 16404325 in words is "sixteen million, four hundred four thousand, three hundred twenty-five".