12909240 has 64 divisors (see below), whose sum is σ = 43034400. Its totient is φ = 3442176.

The previous prime is 12909223. The next prime is 12909241. The reversal of 12909240 is 4290921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4897 + ... + 7056.

Almost surely, 2^12909240 is an apocalyptic number.

12909240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12909240 is an abundant number, since it is smaller than the sum of its proper divisors (30125160).

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

12909240 is a wasteful number, since it uses less digits than its factorization.

12909240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11973 (or 11963 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12909240 is about 3592.9430833232. The cubic root of 12909240 is about 234.5849925971.

The spelling of 12909240 in words is "twelve million, nine hundred nine thousand, two hundred forty".