12423240 has 64 divisors (see below), whose sum is σ = 41414400. Its totient is φ = 3312576.

The previous prime is 12423239. The next prime is 12423251. The reversal of 12423240 is 4232421.

12423240 is a `hidden beast` number, since 1 + 2 + 423 + 240 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4672 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (647100).

Almost surely, 2^12423240 is an apocalyptic number.

12423240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12423240 is an abundant number, since it is smaller than the sum of its proper divisors (28991160).

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

12423240 is a wasteful number, since it uses less digits than its factorization.

12423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11523 (or 11513 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12423240 is about 3524.6616858927. The cubic root of 12423240 is about 231.6034148064.

Adding to 12423240 its reverse (4232421), we get a palindrome (16655661).

The spelling of 12423240 in words is "twelve million, four hundred twenty-three thousand, two hundred forty".