12132240 has 40 divisors (see below), whose sum is σ = 37610688. Its totient is φ = 3235200.

The previous prime is 12132223. The next prime is 12132259. The reversal of 12132240 is 4223121.

12132240 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25036 + ... + 25515.

Almost surely, 2^12132240 is an apocalyptic number.

12132240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12132240 is an abundant number, since it is smaller than the sum of its proper divisors (25478448).

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

12132240 is a wasteful number, since it uses less digits than its factorization.

12132240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50567 (or 50561 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12132240 is about 3483.1365175657. The cubic root of 12132240 is about 229.7807614702.

Adding to 12132240 its reverse (4223121), we get a palindrome (16355361).

The spelling of 12132240 in words is "twelve million, one hundred thirty-two thousand, two hundred forty".