1325455161 has 4 divisors (see below), whose sum is σ = 1767273552. Its totient is φ = 883636772.

The previous prime is 1325455147. The next prime is 1325455163. The reversal of 1325455161 is 1615545231.

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 not a de Polignac number, because 1325455161 - 2¹⁷ = 1325324089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1325455163) 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, 220909191 + ... + 220909196.

It is an arithmetic number, because the mean of its divisors is an integer number (441818388).

Almost surely, 2^1325455161 is an apocalyptic number.

It is an amenable number.

1325455161 is a deficient number, since it is larger than the sum of its proper divisors (441818391).

1325455161 is an equidigital number, since it uses as much as digits as its factorization.

1325455161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441818390.

The product of its digits is 18000, while the sum is 33.

The square root of 1325455161 is about 36406.8010267313. The cubic root of 1325455161 is about 1098.4703700676.

The spelling of 1325455161 in words is "one billion, three hundred twenty-five million, four hundred fifty-five thousand, one hundred sixty-one".