12173531 has 2 divisors, whose sum is σ = 12173532. Its totient is φ = 12173530.

The previous prime is 12173521. The next prime is 12173543. The reversal of 12173531 is 13537121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12173531 - 2¹⁴ = 12157147 is a prime.

It is a super-2 number, since 2×12173531² = 296389714015922, 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 = 12173497 and 12173506.

It is not a weakly prime, because it can be changed into another prime (12173501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086765 + 6086766.

It is an arithmetic number, because the mean of its divisors is an integer number (6086766).

Almost surely, 2^12173531 is an apocalyptic number.

12173531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12173531 is an equidigital number, since it uses as much as digits as its factorization.

12173531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 23.

The square root of 12173531 is about 3489.0587555958. The cubic root of 12173531 is about 230.0411457579.

The spelling of 12173531 in words is "twelve million, one hundred seventy-three thousand, five hundred thirty-one".