12515620 has 48 divisors (see below), whose sum is σ = 29091888. Its totient is φ = 4492800.

The previous prime is 12515603. The next prime is 12515639. The reversal of 12515620 is 2651521.

It can be written as a sum of positive squares in 8 ways, for example, as 2005056 + 10510564 = 1416^2 + 3242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12515591 and 12515600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8970 + ... + 10270.

It is an arithmetic number, because the mean of its divisors is an integer number (606081).

Almost surely, 2^12515620 is an apocalyptic number.

12515620 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 12515620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14545944).

12515620 is an abundant number, since it is smaller than the sum of its proper divisors (16576268).

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

12515620 is a wasteful number, since it uses less digits than its factorization.

12515620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12515620 is about 3537.7422178559. The cubic root of 12515620 is about 232.1760702662.

The spelling of 12515620 in words is "twelve million, five hundred fifteen thousand, six hundred twenty".