15985145 has 16 divisors (see below), whose sum is σ = 21003840. Its totient is φ = 11582400.

The previous prime is 15985141. The next prime is 15985157. The reversal of 15985145 is 54158951.

It is not a de Polignac number, because 15985145 - 2² = 15985141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15985099 and 15985108.

It is not an unprimeable number, because it can be changed into a prime (15985141) 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 15 ways as a sum of consecutive naturals, for example, 27710 + ... + 28280.

It is an arithmetic number, because the mean of its divisors is an integer number (1312740).

Almost surely, 2^15985145 is an apocalyptic number.

It is an amenable number.

15985145 is a deficient number, since it is larger than the sum of its proper divisors (5018695).

15985145 is a wasteful number, since it uses less digits than its factorization.

15985145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096.

The product of its digits is 36000, while the sum is 38.

The square root of 15985145 is about 3998.1426938017. The cubic root of 15985145 is about 251.9062019688.

The spelling of 15985145 in words is "fifteen million, nine hundred eighty-five thousand, one hundred forty-five".