15641191 has 2 divisors, whose sum is σ = 15641192. Its totient is φ = 15641190.

The previous prime is 15641189. The next prime is 15641221. The reversal of 15641191 is 19114651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15641191 - 2¹ = 15641189 is a prime.

Together with 15641189, it forms a pair of twin primes.

It is equal to p_1009459 and since 15641191 and 1009459 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15641111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820595 + 7820596.

It is an arithmetic number, because the mean of its divisors is an integer number (7820596).

Almost surely, 2^15641191 is an apocalyptic number.

15641191 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641191 is an equidigital number, since it uses as much as digits as its factorization.

15641191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 28.

The square root of 15641191 is about 3954.8945624378. The cubic root of 15641191 is about 250.0863221905.

The spelling of 15641191 in words is "fifteen million, six hundred forty-one thousand, one hundred ninety-one".