15240661 has 4 divisors (see below), whose sum is σ = 15252192. Its totient is φ = 15229132.

The previous prime is 15240629. The next prime is 15240713. The reversal of 15240661 is 16604251.

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 15240661 - 2⁵ = 15240629 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 (15240761) 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 3 ways as a sum of consecutive naturals, for example, 3481 + ... + 6526.

It is an arithmetic number, because the mean of its divisors is an integer number (3813048).

Almost surely, 2^15240661 is an apocalyptic number.

It is an amenable number.

15240661 is a deficient number, since it is larger than the sum of its proper divisors (11531).

15240661 is a wasteful number, since it uses less digits than its factorization.

15240661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11530.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 15240661 is about 3903.9289184103. The cubic root of 15240661 is about 247.9331516410.

The spelling of 15240661 in words is "fifteen million, two hundred forty thousand, six hundred sixty-one".