15149985 has 16 divisors (see below), whose sum is σ = 25294464. Its totient is φ = 7728512.

The previous prime is 15149969. The next prime is 15149987. The reversal of 15149985 is 58994151.

It is a cyclic number.

It is not a de Polignac number, because 15149985 - 2⁴ = 15149969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15149987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21612 + ... + 22301.

It is an arithmetic number, because the mean of its divisors is an integer number (1580904).

Almost surely, 2^15149985 is an apocalyptic number.

15149985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15149985 is a deficient number, since it is larger than the sum of its proper divisors (10144479).

15149985 is a wasteful number, since it uses less digits than its factorization.

15149985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43944.

The product of its digits is 64800, while the sum is 42.

The square root of 15149985 is about 3892.2981643240. The cubic root of 15149985 is about 247.4404713481.

The spelling of 15149985 in words is "fifteen million, one hundred forty-nine thousand, nine hundred eighty-five".