12159731 has 2 divisors, whose sum is σ = 12159732. Its totient is φ = 12159730.

The previous prime is 12159703. The next prime is 12159757. The reversal of 12159731 is 13795121.

12159731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12159731 is a prime.

It is a super-2 number, since 2×12159731² = 295718115984722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12159694 and 12159703.

It is not a weakly prime, because it can be changed into another prime (12159701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6079865 + 6079866.

It is an arithmetic number, because the mean of its divisors is an integer number (6079866).

Almost surely, 2^12159731 is an apocalyptic number.

12159731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12159731 is an equidigital number, since it uses as much as digits as its factorization.

12159731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 29.

The square root of 12159731 is about 3487.0805840990. The cubic root of 12159731 is about 229.9541874728.

The spelling of 12159731 in words is "twelve million, one hundred fifty-nine thousand, seven hundred thirty-one".