12620500281 has 9 divisors (see below), whose sum is σ = 18230098341. Its totient is φ = 8413442172.

The previous prime is 12620500279. The next prime is 12620500297. The reversal of 12620500281 is 18200502621.

It is a happy number.

The square root of 12620500281 is 112341.

It is a perfect power (a square), and thus also a powerful number.

12620500281 is a `hidden beast` number, since 12 + 620 + 5 + 0 + 0 + 28 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 12620500281 - 2¹ = 12620500279 is a prime.

It is a super-2 number, since 2×12620500281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12620505281) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 318300 + ... + 355746.

Almost surely, 2^12620500281 is an apocalyptic number.

12620500281 is the 112341-st square number.

12620500281 is the 56171-st centered octagonal number.

It is an amenable number.

12620500281 is a deficient number, since it is larger than the sum of its proper divisors (5609598060).

12620500281 is an frugal number, since it uses more digits than its factorization.

12620500281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74900 (or 37450 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 12620500281 in words is "twelve billion, six hundred twenty million, five hundred thousand, two hundred eighty-one".