12902915281 has 3 divisors (see below), whose sum is σ = 12903028873. Its totient is φ = 12902801690.

The previous prime is 12902915279. The next prime is 12902915293. The reversal of 12902915281 is 18251920921.

The square root of 12902915281 is 113591.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 12902915281 - 2¹ = 12902915279 is a prime.

It is a super-3 number, since 3×12902915281³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12902910281) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56796 + ... + 170386.

Almost surely, 2^12902915281 is an apocalyptic number.

12902915281 is the 113591-st square number.

12902915281 is the 56796-th centered octagonal number.

It is an amenable number.

12902915281 is a deficient number, since it is larger than the sum of its proper divisors (113592).

12902915281 is an frugal number, since it uses more digits than its factorization.

12902915281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227182 (or 113591 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 12902915281 in words is "twelve billion, nine hundred two million, nine hundred fifteen thousand, two hundred eighty-one".