1293196561 has 4 divisors (see below), whose sum is σ = 1293276724. Its totient is φ = 1293116400.

The previous prime is 1293196559. The next prime is 1293196573. The reversal of 1293196561 is 1656913921.

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 2 ways, for example, as 914699536 + 378497025 = 30244^2 + 19455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1293196561 - 2¹ = 1293196559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1293191561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6510 + ... + 51271.

It is an arithmetic number, because the mean of its divisors is an integer number (323319181).

Almost surely, 2^1293196561 is an apocalyptic number.

It is an amenable number.

1293196561 is a deficient number, since it is larger than the sum of its proper divisors (80163).

1293196561 is an equidigital number, since it uses as much as digits as its factorization.

1293196561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80162.

The product of its digits is 87480, while the sum is 43.

The square root of 1293196561 is about 35961.0422679877. The cubic root of 1293196561 is about 1089.4856482429.

The spelling of 1293196561 in words is "one billion, two hundred ninety-three million, one hundred ninety-six thousand, five hundred sixty-one".