12240731 has 8 divisors (see below), whose sum is σ = 13643280. Its totient is φ = 10914048.

The previous prime is 12240719. The next prime is 12240749. The reversal of 12240731 is 13704221.

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 12240731 - 2⁶ = 12240667 is a prime.

It is a super-2 number, since 2×12240731² = 299670990828722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240751) 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, 18626 + ... + 19271.

It is an arithmetic number, because the mean of its divisors is an integer number (1705410).

Almost surely, 2^12240731 is an apocalyptic number.

12240731 is a deficient number, since it is larger than the sum of its proper divisors (1402549).

12240731 is a wasteful number, since it uses less digits than its factorization.

12240731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37933.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12240731 is about 3498.6756065689. The cubic root of 12240731 is about 230.4636582535.

Adding to 12240731 its reverse (13704221), we get a palindrome (25944952).

The spelling of 12240731 in words is "twelve million, two hundred forty thousand, seven hundred thirty-one".