15990425 has 12 divisors (see below), whose sum is σ = 21631056. Its totient is φ = 11629200.

The previous prime is 15990361. The next prime is 15990427. The reversal of 15990425 is 52409951.

It is not a de Polignac number, because 15990425 - 2⁶ = 15990361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15990427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28799 + ... + 29348.

It is an arithmetic number, because the mean of its divisors is an integer number (1802588).

Almost surely, 2^15990425 is an apocalyptic number.

It is an amenable number.

15990425 is a deficient number, since it is larger than the sum of its proper divisors (5640631).

15990425 is a wasteful number, since it uses less digits than its factorization.

15990425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58168 (or 58163 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 15990425 is about 3998.8029458827. The cubic root of 15990425 is about 251.9339343485.

The spelling of 15990425 in words is "fifteen million, nine hundred ninety thousand, four hundred twenty-five".