12515247841 has 4 divisors (see below), whose sum is σ = 12551108500. Its totient is φ = 12479387184.

The previous prime is 12515247839. The next prime is 12515247847. The reversal of 12515247841 is 14874251521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6658560000 + 5856687841 = 81600^2 + 76529^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515247841 - 2¹ = 12515247839 is a prime.

It is a super-2 number, since 2×12515247841² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12515247794 and 12515247803.

It is not an unprimeable number, because it can be changed into a prime (12515247847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17929806 + ... + 17930503.

It is an arithmetic number, because the mean of its divisors is an integer number (3137777125).

Almost surely, 2^12515247841 is an apocalyptic number.

It is an amenable number.

12515247841 is a deficient number, since it is larger than the sum of its proper divisors (35860659).

12515247841 is an equidigital number, since it uses as much as digits as its factorization.

12515247841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35860658.

The product of its digits is 89600, while the sum is 40.

The spelling of 12515247841 in words is "twelve billion, five hundred fifteen million, two hundred forty-seven thousand, eight hundred forty-one".