12385531 has 2 divisors, whose sum is σ = 12385532. Its totient is φ = 12385530.

The previous prime is 12385519. The next prime is 12385559. The reversal of 12385531 is 13558321.

It is an a-pointer prime, because the next prime (12385559) can be obtained adding 12385531 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12385531 - 2²¹ = 10288379 is a prime.

It is a super-2 number, since 2×12385531² = 306802756303922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12385531.

It is not a weakly prime, because it can be changed into another prime (12385031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6192765 + 6192766.

It is an arithmetic number, because the mean of its divisors is an integer number (6192766).

Almost surely, 2^12385531 is an apocalyptic number.

12385531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12385531 is an equidigital number, since it uses as much as digits as its factorization.

12385531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 12385531 is about 3519.3083127228. The cubic root of 12385531 is about 231.3688440994.

The spelling of 12385531 in words is "twelve million, three hundred eighty-five thousand, five hundred thirty-one".