12240855 has 32 divisors (see below), whose sum is σ = 23742720. Its totient is φ = 5934240.

The previous prime is 12240847. The next prime is 12240857. The reversal of 12240855 is 55804221.

It is a happy number.

It is not a de Polignac number, because 12240855 - 2³ = 12240847 is a prime.

It is a super-2 number, since 2×12240855² = 299677062262050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) 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 (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2637 + ... + 5606.

It is an arithmetic number, because the mean of its divisors is an integer number (741960).

Almost surely, 2^12240855 is an apocalyptic number.

12240855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12240855 is a deficient number, since it is larger than the sum of its proper divisors (11501865).

12240855 is a wasteful number, since it uses less digits than its factorization.

12240855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268 (or 8262 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 12240855 is about 3498.6933275153. The cubic root of 12240855 is about 230.4644364586.

The spelling of 12240855 in words is "twelve million, two hundred forty thousand, eight hundred fifty-five".