1332256161 has 4 divisors (see below), whose sum is σ = 1776341552. Its totient is φ = 888170772.

The previous prime is 1332256139. The next prime is 1332256183. The reversal of 1332256161 is 1616522331.

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 an interprime number because it is at equal distance from previous prime (1332256139) and next prime (1332256183).

It is a de Polignac number, because none of the positive numbers 2^k-1332256161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1332256061) 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, 222042691 + ... + 222042696.

It is an arithmetic number, because the mean of its divisors is an integer number (444085388).

Almost surely, 2^1332256161 is an apocalyptic number.

It is an amenable number.

1332256161 is a deficient number, since it is larger than the sum of its proper divisors (444085391).

1332256161 is an equidigital number, since it uses as much as digits as its factorization.

1332256161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444085390.

The product of its digits is 6480, while the sum is 30.

The square root of 1332256161 is about 36500.0843971627. The cubic root of 1332256161 is about 1100.3459410552.

Adding to 1332256161 its reverse (1616522331), we get a palindrome (2948778492).

The spelling of 1332256161 in words is "one billion, three hundred thirty-two million, two hundred fifty-six thousand, one hundred sixty-one".