12135940 has 36 divisors (see below), whose sum is σ = 26211276. Its totient is φ = 4718272.

The previous prime is 12135931. The next prime is 12135941. The reversal of 12135940 is 4953121.

It can be written as a sum of positive squares in 2 ways, for example, as 6594624 + 5541316 = 2568^2 + 2354^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113367 + ... + 113473.

It is an arithmetic number, because the mean of its divisors is an integer number (728091).

Almost surely, 2^12135940 is an apocalyptic number.

12135940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12135940 is an abundant number, since it is smaller than the sum of its proper divisors (14075336).

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

12135940 is a wasteful number, since it uses less digits than its factorization.

12135940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12135940 is about 3483.6676075653. The cubic root of 12135940 is about 229.8041180365.

The spelling of 12135940 in words is "twelve million, one hundred thirty-five thousand, nine hundred forty".