12631140 has 144 divisors (see below), whose sum is σ = 41827968. Its totient is φ = 3193344.

The previous prime is 12631111. The next prime is 12631141. The reversal of 12631140 is 4113621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12631141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111724 + ... + 111836.

It is an arithmetic number, because the mean of its divisors is an integer number (290472).

Almost surely, 2^12631140 is an apocalyptic number.

12631140 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 12631140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20913984).

12631140 is an abundant number, since it is smaller than the sum of its proper divisors (29196828).

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

12631140 is a wasteful number, since it uses less digits than its factorization.

12631140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12631140 is about 3554.0315136476. The cubic root of 12631140 is about 232.8882171779. Note that the first 3 decimals are identical.

Adding to 12631140 its reverse (4113621), we get a palindrome (16744761).

The spelling of 12631140 in words is "twelve million, six hundred thirty-one thousand, one hundred forty".