12015997 has 8 divisors (see below), whose sum is σ = 13755456. Its totient is φ = 10282272.

The previous prime is 12015977. The next prime is 12016013. The reversal of 12015997 is 79951021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12015997 - 2¹¹ = 12013949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4998 + ... + 7000.

It is an arithmetic number, because the mean of its divisors is an integer number (1719432).

Almost surely, 2^12015997 is an apocalyptic number.

It is an amenable number.

12015997 is a deficient number, since it is larger than the sum of its proper divisors (1739459).

12015997 is an equidigital number, since it uses as much as digits as its factorization.

12015997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 12015997 is about 3466.4098142026. The cubic root of 12015997 is about 229.0445366363.

The spelling of 12015997 in words is "twelve million, fifteen thousand, nine hundred ninety-seven".