12015919 has 2 divisors, whose sum is σ = 12015920. Its totient is φ = 12015918.

The previous prime is 12015917. The next prime is 12015931. The reversal of 12015919 is 91951021.

It is a weak prime.

It is an emirp because it is prime and its reverse (91951021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12015919 - 2¹ = 12015917 is a prime.

It is a super-2 number, since 2×12015919² = 288764618829122, which contains 22 as substring.

Together with 12015917, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12015917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007959 + 6007960.

It is an arithmetic number, because the mean of its divisors is an integer number (6007960).

Almost surely, 2^12015919 is an apocalyptic number.

12015919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015919 is an equidigital number, since it uses as much as digits as its factorization.

12015919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 12015919 is about 3466.3985633507. The cubic root of 12015919 is about 229.0440410328.

The spelling of 12015919 in words is "twelve million, fifteen thousand, nine hundred nineteen".