12540031 has 6 divisors (see below), whose sum is σ = 14587440. Its totient is φ = 10748556.

The previous prime is 12539993. The next prime is 12540041. The reversal of 12540031 is 13004521.

It is not a de Polignac number, because 12540031 - 2¹⁹ = 12015743 is a prime.

It is a super-2 number, since 2×12540031² = 314504754961922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12539987 and 12540014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127911 + ... + 128008.

It is an arithmetic number, because the mean of its divisors is an integer number (2431240).

Almost surely, 2^12540031 is an apocalyptic number.

12540031 is a deficient number, since it is larger than the sum of its proper divisors (2047409).

12540031 is an equidigital number, since it uses as much as digits as its factorization.

12540031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255933 (or 255926 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12540031 is about 3541.1906189868. The cubic root of 12540031 is about 232.3269209427.

Adding to 12540031 its reverse (13004521), we get a palindrome (25544552).

The spelling of 12540031 in words is "twelve million, five hundred forty thousand, thirty-one".