12157140 has 48 divisors (see below), whose sum is σ = 34691328. Its totient is φ = 3179904.

The previous prime is 12157139. The next prime is 12157141. The reversal of 12157140 is 4175121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12157139) and next prime (12157141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1269 + ... + 5091.

It is an arithmetic number, because the mean of its divisors is an integer number (722736).

Almost surely, 2^12157140 is an apocalyptic number.

12157140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12157140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17345664).

12157140 is an abundant number, since it is smaller than the sum of its proper divisors (22534188).

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

12157140 is a wasteful number, since it uses less digits than its factorization.

12157140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888 (or 3886 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 12157140 is about 3486.7090500929. The cubic root of 12157140 is about 229.9378534047.

The spelling of 12157140 in words is "twelve million, one hundred fifty-seven thousand, one hundred forty".