12081631 has 2 divisors, whose sum is σ = 12081632. Its totient is φ = 12081630.

The previous prime is 12081613. The next prime is 12081653. The reversal of 12081631 is 13618021.

Together with previous prime (12081613) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (12081653) can be obtained adding 12081631 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12081631 - 2⁹ = 12081119 is a prime.

It is a super-2 number, since 2×12081631² = 291931615240322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12081031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040815 + 6040816.

It is an arithmetic number, because the mean of its divisors is an integer number (6040816).

Almost surely, 2^12081631 is an apocalyptic number.

12081631 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081631 is an equidigital number, since it uses as much as digits as its factorization.

12081631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 12081631 is about 3475.8640652362. The cubic root of 12081631 is about 229.4608100564.

Adding to 12081631 its reverse (13618021), we get a palindrome (25699652).

The spelling of 12081631 in words is "twelve million, eighty-one thousand, six hundred thirty-one".