12902460921 has 63 divisors (see below), whose sum is σ = 22540688703. Its totient is φ = 7360567200.

The previous prime is 12902460869. The next prime is 12902460931. The reversal of 12902460921 is 12906420921.

The square root of 12902460921 is 113589.

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

12902460921 is a `hidden beast` number, since 1 + 2 + 9 + 0 + 24 + 609 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10844931321 + 2057529600 = 104139^2 + 45360^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 12902460921 - 2²¹ = 12900363769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12902460931) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 21468021 + ... + 21468621.

Almost surely, 2^12902460921 is an apocalyptic number.

12902460921 is the 113589-th square number.

12902460921 is the 56795-th centered octagonal number.

It is an amenable number.

12902460921 is a deficient number, since it is larger than the sum of its proper divisors (9638227782).

12902460921 is an frugal number, since it uses more digits than its factorization.

12902460921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

Multiplying 12902460921 by its sum of digits (36), we get a square (464488593156 = 681534²).

The spelling of 12902460921 in words is "twelve billion, nine hundred two million, four hundred sixty thousand, nine hundred twenty-one".