12540023 has 8 divisors (see below), whose sum is σ = 12859392. Its totient is φ = 12222936.

The previous prime is 12539993. The next prime is 12540041. The reversal of 12540023 is 32004521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12540023 - 2⁸ = 12539767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12539983 and 12540010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16886 + ... + 17612.

It is an arithmetic number, because the mean of its divisors is an integer number (1607424).

Almost surely, 2^12540023 is an apocalyptic number.

12540023 is a deficient number, since it is larger than the sum of its proper divisors (319369).

12540023 is an equidigital number, since it uses as much as digits as its factorization.

12540023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 12540023 is about 3541.1894894230. The cubic root of 12540023 is about 232.3268715378.

Adding to 12540023 its reverse (32004521), we get a palindrome (44544544).

The spelling of 12540023 in words is "twelve million, five hundred forty thousand, twenty-three".