1295967661 has 8 divisors (see below), whose sum is σ = 1337969664. Its totient is φ = 1254332880.

The previous prime is 1295967623. The next prime is 1295967671. The reversal of 1295967661 is 1667695921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1295967661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1295967599 and 1295967608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1295967601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84625 + ... + 98758.

It is an arithmetic number, because the mean of its divisors is an integer number (167246208).

Almost surely, 2^1295967661 is an apocalyptic number.

It is an amenable number.

1295967661 is a deficient number, since it is larger than the sum of its proper divisors (42002003).

1295967661 is a wasteful number, since it uses less digits than its factorization.

1295967661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183611.

The product of its digits is 1224720, while the sum is 52.

The square root of 1295967661 is about 35999.5508444203. The cubic root of 1295967661 is about 1090.2632871265.

The spelling of 1295967661 in words is "one billion, two hundred ninety-five million, nine hundred sixty-seven thousand, six hundred sixty-one".