12132855 has 64 divisors (see below), whose sum is σ = 25390080. Its totient is φ = 5380992.

The previous prime is 12132853. The next prime is 12132859. The reversal of 12132855 is 55823121.

It is a happy number.

It is not a de Polignac number, because 12132855 - 2¹ = 12132853 is a prime.

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 (12132851) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34792 + ... + 35138.

It is an arithmetic number, because the mean of its divisors is an integer number (396720).

Almost surely, 2^12132855 is an apocalyptic number.

12132855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12132855 is an abundant number, since it is smaller than the sum of its proper divisors (13257225).

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

12132855 is a wasteful number, since it uses less digits than its factorization.

12132855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 399 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 12132855 is about 3483.2247989471. The cubic root of 12132855 is about 229.7846440393.

Adding to 12132855 its reverse (55823121), we get a palindrome (67955976).

The spelling of 12132855 in words is "twelve million, one hundred thirty-two thousand, eight hundred fifty-five".