12158431 has 2 divisors, whose sum is σ = 12158432. Its totient is φ = 12158430.

The previous prime is 12158411. The next prime is 12158449. The reversal of 12158431 is 13485121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12158431 - 2¹¹ = 12156383 is a prime.

It is a super-2 number, since 2×12158431² = 295654888763522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12158396 and 12158405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12158401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6079215 + 6079216.

It is an arithmetic number, because the mean of its divisors is an integer number (6079216).

Almost surely, 2^12158431 is an apocalyptic number.

12158431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12158431 is an equidigital number, since it uses as much as digits as its factorization.

12158431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 12158431 is about 3486.8941767711. The cubic root of 12158431 is about 229.9459923601.

The spelling of 12158431 in words is "twelve million, one hundred fifty-eight thousand, four hundred thirty-one".