15087661 has 4 divisors (see below), whose sum is σ = 15113952. Its totient is φ = 15061372.

The previous prime is 15087659. The next prime is 15087703. The reversal of 15087661 is 16678051.

15087661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15087661 - 2¹ = 15087659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15087161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12265 + ... + 13438.

It is an arithmetic number, because the mean of its divisors is an integer number (3778488).

Almost surely, 2^15087661 is an apocalyptic number.

It is an amenable number.

15087661 is a deficient number, since it is larger than the sum of its proper divisors (26291).

15087661 is an equidigital number, since it uses as much as digits as its factorization.

15087661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26290.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 15087661 is about 3884.2838464767. The cubic root of 15087661 is about 247.1006981765.

The spelling of 15087661 in words is "fifteen million, eighty-seven thousand, six hundred sixty-one".