12420156260 has 12 divisors (see below), whose sum is σ = 26082328188. Its totient is φ = 4968062496.

The previous prime is 12420156253. The next prime is 12420156283. The reversal of 12420156260 is 6265102421.

12420156260 = 10114² + 10115² + ... + 10233².

It can be written as a sum of positive squares in 2 ways, for example, as 5203313956 + 7216842304 = 72134^2 + 84952^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310503887 + ... + 310503926.

It is an arithmetic number, because the mean of its divisors is an integer number (2173527349).

Almost surely, 2^12420156260 is an apocalyptic number.

12420156260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420156260 is an abundant number, since it is smaller than the sum of its proper divisors (13662171928).

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

12420156260 is a wasteful number, since it uses less digits than its factorization.

12420156260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621007822 (or 621007820 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 12420156260 its reverse (6265102421), we get a palindrome (18685258681).

The spelling of 12420156260 in words is "twelve billion, four hundred twenty million, one hundred fifty-six thousand, two hundred sixty".