1292698506961 has 3 divisors (see below), whose sum is σ = 1292699643931. Its totient is φ = 1292697369992.

The previous prime is 1292698506943. The next prime is 1292698506977. The reversal of 1292698506961 is 1696058962921.

The square root of 1292698506961 is 1136969.

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 can be written as a sum of positive squares in only one way, i.e., 1096378620561 + 196319886400 = 1047081^2 + 443080^2 .

It is not a de Polignac number, because 1292698506961 - 2¹¹ = 1292698504913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1292698506893 and 1292698506902.

It is not an unprimeable number, because it can be changed into a prime (1292698506361) 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, 568485 + ... + 1705453.

Almost surely, 2^{1292698506961} is an apocalyptic number.

1292698506961 is the 1136969-th square number.

1292698506961 is the 568485-th centered octagonal number.

It is an amenable number.

1292698506961 is a deficient number, since it is larger than the sum of its proper divisors (1136970).

1292698506961 is an frugal number, since it uses more digits than its factorization.

1292698506961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273938 (or 1136969 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 64.

Multiplying 1292698506961 by its sum of digits (64), we get a square (82732704445504 = 9095752²).

The spelling of 1292698506961 in words is "one trillion, two hundred ninety-two billion, six hundred ninety-eight million, five hundred six thousand, nine hundred sixty-one".