1295522255921 has 4 divisors (see below), whose sum is σ = 1295531148912. Its totient is φ = 1295513362932.

The previous prime is 1295522255893. The next prime is 1295522255941.

1295522255921 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1295522255921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1295522255921.

It is not an unprimeable number, because it can be changed into a prime (1295522255941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4224275 + ... + 4520568.

It is an arithmetic number, because the mean of its divisors is an integer number (323882787228).

Almost surely, 2^{1295522255921} is an apocalyptic number.

It is an amenable number.

1295522255921 is a deficient number, since it is larger than the sum of its proper divisors (8892991).

1295522255921 is an equidigital number, since it uses as much as digits as its factorization.

1295522255921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892990.

The product of its digits is 1620000, while the sum is 50.

The spelling of 1295522255921 in words is "one trillion, two hundred ninety-five billion, five hundred twenty-two million, two hundred fifty-five thousand, nine hundred twenty-one".