12515542 has 16 divisors (see below), whose sum is σ = 21097440. Its totient is φ = 5524992.

The previous prime is 12515539. The next prime is 12515543. The reversal of 12515542 is 24551521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9867 + ... + 11062.

It is an arithmetic number, because the mean of its divisors is an integer number (1318590).

Almost surely, 2^12515542 is an apocalyptic number.

12515542 is a deficient number, since it is larger than the sum of its proper divisors (8581898).

12515542 is a wasteful number, since it uses less digits than its factorization.

12515542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20967.

The product of its digits is 2000, while the sum is 25.

The square root of 12515542 is about 3537.7311938586. The cubic root of 12515542 is about 232.1755879417.

The spelling of 12515542 in words is "twelve million, five hundred fifteen thousand, five hundred forty-two".