15291641 has 2 divisors, whose sum is σ = 15291642. Its totient is φ = 15291640.

The previous prime is 15291631. The next prime is 15291659. The reversal of 15291641 is 14619251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 2042041 = 3640^2 + 1429^2 .

It is an emirp because it is prime and its reverse (14619251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15291641 - 2²² = 11097337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15291631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7645820 + 7645821.

It is an arithmetic number, because the mean of its divisors is an integer number (7645821).

Almost surely, 2^15291641 is an apocalyptic number.

It is an amenable number.

15291641 is a deficient number, since it is larger than the sum of its proper divisors (1).

15291641 is an equidigital number, since it uses as much as digits as its factorization.

15291641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 15291641 is about 3910.4527870823. The cubic root of 15291641 is about 248.2092893802.

The spelling of 15291641 in words is "fifteen million, two hundred ninety-one thousand, six hundred forty-one".