12047240 has 16 divisors (see below), whose sum is σ = 27106380. Its totient is φ = 4818880.

The previous prime is 12047227. The next prime is 12047249. The reversal of 12047240 is 4274021.

It can be written as a sum of positive squares in 2 ways, for example, as 10640644 + 1406596 = 3262^2 + 1186^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12047249) 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 3 ways as a sum of consecutive naturals, for example, 150551 + ... + 150630.

Almost surely, 2^12047240 is an apocalyptic number.

12047240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12047240 is an abundant number, since it is smaller than the sum of its proper divisors (15059140).

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

12047240 is a wasteful number, since it uses less digits than its factorization.

12047240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301192 (or 301188 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 12047240 is about 3470.9134244461. The cubic root of 12047240 is about 229.2428790411.

The spelling of 12047240 in words is "twelve million, forty-seven thousand, two hundred forty".