12071997 has 48 divisors (see below), whose sum is σ = 21245952. Its totient is φ = 6706800.

The previous prime is 12071981. The next prime is 12072001. The reversal of 12071997 is 79917021.

12071997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12071997 - 2⁴ = 12071981 is a prime.

It is a super-2 number, since 2×12071997² = 291466223136018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12071947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79872 + ... + 80022.

It is an arithmetic number, because the mean of its divisors is an integer number (442624).

Almost surely, 2^12071997 is an apocalyptic number.

It is an amenable number.

12071997 is a deficient number, since it is larger than the sum of its proper divisors (9173955).

12071997 is an equidigital number, since it uses as much as digits as its factorization.

12071997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 12071997 is about 3474.4779463971. The cubic root of 12071997 is about 229.3998024741.

The spelling of 12071997 in words is "twelve million, seventy-one thousand, nine hundred ninety-seven".