12540331 has 2 divisors, whose sum is σ = 12540332. Its totient is φ = 12540330.

The previous prime is 12540329. The next prime is 12540347. The reversal of 12540331 is 13304521.

12540331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12540331 - 2¹ = 12540329 is a prime.

It is a super-2 number, since 2×12540331² = 314519803179122, which contains 22 as substring.

Together with 12540329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12540299 and 12540308.

It is not a weakly prime, because it can be changed into another prime (12540371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270165 + 6270166.

It is an arithmetic number, because the mean of its divisors is an integer number (6270166).

Almost surely, 2^12540331 is an apocalyptic number.

12540331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12540331 is an equidigital number, since it uses as much as digits as its factorization.

12540331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12540331 is about 3541.2329773682. The cubic root of 12540331 is about 232.3287736101.

Adding to 12540331 its reverse (13304521), we get a palindrome (25844852).

The spelling of 12540331 in words is "twelve million, five hundred forty thousand, three hundred thirty-one".