12431340 has 48 divisors (see below), whose sum is σ = 38676960. Its totient is φ = 3314880.

The previous prime is 12431329. The next prime is 12431357. The reversal of 12431340 is 4313421.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10971 + ... + 12050.

It is an arithmetic number, because the mean of its divisors is an integer number (805770).

Almost surely, 2^12431340 is an apocalyptic number.

12431340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12431340 is an abundant number, since it is smaller than the sum of its proper divisors (26245620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12431340 is a wasteful number, since it uses less digits than its factorization.

12431340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23039 (or 23031 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12431340 is about 3525.8105451087. The cubic root of 12431340 is about 231.6537393082.

Adding to 12431340 its reverse (4313421), we get a palindrome (16744761).

The spelling of 12431340 in words is "twelve million, four hundred thirty-one thousand, three hundred forty".