1296074661 has 8 divisors (see below), whose sum is σ = 1974970944. Its totient is φ = 740614080.

The previous prime is 1296074651. The next prime is 1296074671. The reversal of 1296074661 is 1664706921.

It is an interprime number because it is at equal distance from previous prime (1296074651) and next prime (1296074671).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1296074661 - 2²⁷ = 1161856933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296074651) 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 7 ways as a sum of consecutive naturals, for example, 30858900 + ... + 30858941.

It is an arithmetic number, because the mean of its divisors is an integer number (246871368).

Almost surely, 2^1296074661 is an apocalyptic number.

It is an amenable number.

1296074661 is a deficient number, since it is larger than the sum of its proper divisors (678896283).

1296074661 is an equidigital number, since it uses as much as digits as its factorization.

1296074661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61717851.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1296074661 is about 36001.0369433993. The cubic root of 1296074661 is about 1090.2932917233.

The spelling of 1296074661 in words is "one billion, two hundred ninety-six million, seventy-four thousand, six hundred sixty-one".