1321669265 has 8 divisors (see below), whose sum is σ = 1812575040. Its totient is φ = 906287472.

The previous prime is 1321669247. The next prime is 1321669303. The reversal of 1321669265 is 5629661231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321669265 - 2⁶ = 1321669201 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18880955 + ... + 18881024.

It is an arithmetic number, because the mean of its divisors is an integer number (226571880).

Almost surely, 2^1321669265 is an apocalyptic number.

It is an amenable number.

1321669265 is a deficient number, since it is larger than the sum of its proper divisors (490905775).

1321669265 is an equidigital number, since it uses as much as digits as its factorization.

1321669265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37761991.

The product of its digits is 116640, while the sum is 41.

The square root of 1321669265 is about 36354.7694945244. The cubic root of 1321669265 is about 1097.4235195242.

The spelling of 1321669265 in words is "one billion, three hundred twenty-one million, six hundred sixty-nine thousand, two hundred sixty-five".