15132987 has 20 divisors (see below), whose sum is σ = 23798280. Its totient is φ = 9556704.

The previous prime is 15132967. The next prime is 15133031. The reversal of 15132987 is 78923151.

It is not a de Polignac number, because 15132987 - 2¹⁵ = 15100219 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15132967) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3378 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (1189914).

Almost surely, 2^15132987 is an apocalyptic number.

15132987 is a deficient number, since it is larger than the sum of its proper divisors (8665293).

15132987 is an equidigital number, since it uses as much as digits as its factorization.

15132987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9864 (or 9855 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 15132987 is about 3890.1140086121. The cubic root of 15132987 is about 247.3478955220.

The spelling of 15132987 in words is "fifteen million, one hundred thirty-two thousand, nine hundred eighty-seven".