15012661 has 2 divisors, whose sum is σ = 15012662. Its totient is φ = 15012660.

The previous prime is 15012653. The next prime is 15012667. The reversal of 15012661 is 16621051.

15012661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 2232036 = 3575^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 15012661 - 2³ = 15012653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15012667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7506330 + 7506331.

It is an arithmetic number, because the mean of its divisors is an integer number (7506331).

Almost surely, 2^15012661 is an apocalyptic number.

It is an amenable number.

15012661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15012661 is an equidigital number, since it uses as much as digits as its factorization.

15012661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 15012661 is about 3874.6175295118. The cubic root of 15012661 is about 246.6905761663.

The spelling of 15012661 in words is "fifteen million, twelve thousand, six hundred sixty-one".