15085891 has 2 divisors, whose sum is σ = 15085892. Its totient is φ = 15085890.

The previous prime is 15085883. The next prime is 15085913. The reversal of 15085891 is 19858051.

It is a weak prime.

It is an emirp because it is prime and its reverse (19858051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15085891 - 2³ = 15085883 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15085891.

It is not a weakly prime, because it can be changed into another prime (15085801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7542945 + 7542946.

It is an arithmetic number, because the mean of its divisors is an integer number (7542946).

Almost surely, 2^15085891 is an apocalyptic number.

15085891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15085891 is an equidigital number, since it uses as much as digits as its factorization.

15085891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 15085891 is about 3884.0559985664. The cubic root of 15085891 is about 247.0910349747.

The spelling of 15085891 in words is "fifteen million, eighty-five thousand, eight hundred ninety-one".