12240813 has 32 divisors (see below), whose sum is σ = 18547200. Its totient is φ = 7128576.

The previous prime is 12240803. The next prime is 12240841. The reversal of 12240813 is 31804221.

It is not a de Polignac number, because 12240813 - 2⁶ = 12240749 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12240813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89281 + ... + 89417.

It is an arithmetic number, because the mean of its divisors is an integer number (579600).

Almost surely, 2^12240813 is an apocalyptic number.

12240813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12240813 is a deficient number, since it is larger than the sum of its proper divisors (6306387).

12240813 is a wasteful number, since it uses less digits than its factorization.

12240813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12240813 is about 3498.6873252693. The cubic root of 12240813 is about 230.4641728736.

The spelling of 12240813 in words is "twelve million, two hundred forty thousand, eight hundred thirteen".