15143985 has 12 divisors (see below), whose sum is σ = 26249652. Its totient is φ = 8076768.

The previous prime is 15143977. The next prime is 15144001. The reversal of 15143985 is 58934151.

It can be written as a sum of positive squares in 2 ways, for example, as 6640929 + 8503056 = 2577^2 + 2916^2 .

It is not a de Polignac number, because 15143985 - 2³ = 15143977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168222 + ... + 168311.

It is an arithmetic number, because the mean of its divisors is an integer number (2187471).

Almost surely, 2^15143985 is an apocalyptic number.

15143985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15143985 is a deficient number, since it is larger than the sum of its proper divisors (11105667).

15143985 is a wasteful number, since it uses less digits than its factorization.

15143985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336544 (or 336541 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 15143985 is about 3891.5273351218. The cubic root of 15143985 is about 247.4078015937.

The spelling of 15143985 in words is "fifteen million, one hundred forty-three thousand, nine hundred eighty-five".