12516140 has 108 divisors (see below), whose sum is σ = 34002864. Its totient is φ = 3788928.

The previous prime is 12516137. The next prime is 12516169. The reversal of 12516140 is 4161521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 544169 + ... + 544191.

Almost surely, 2^12516140 is an apocalyptic number.

12516140 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 12516140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17001432).

12516140 is an abundant number, since it is smaller than the sum of its proper divisors (21486724).

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

12516140 is a wasteful number, since it uses less digits than its factorization.

12516140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 12516140 is about 3537.8157102936. The cubic root of 12516140 is about 232.1792857118.

Adding to 12516140 its reverse (4161521), we get a palindrome (16677661).

The spelling of 12516140 in words is "twelve million, five hundred sixteen thousand, one hundred forty".