1325571161 has 4 divisors (see below), whose sum is σ = 1325686452. Its totient is φ = 1325455872.

The previous prime is 1325571109. The next prime is 1325571217. The reversal of 1325571161 is 1611755231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1611755231 = 107 ⋅15063133.

It can be written as a sum of positive squares in 2 ways, for example, as 769507600 + 556063561 = 27740^2 + 23581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1325571161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325570161) 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, 38216 + ... + 64121.

It is an arithmetic number, because the mean of its divisors is an integer number (331421613).

Almost surely, 2^1325571161 is an apocalyptic number.

It is an amenable number.

1325571161 is a deficient number, since it is larger than the sum of its proper divisors (115291).

1325571161 is a wasteful number, since it uses less digits than its factorization.

1325571161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115290.

The product of its digits is 6300, while the sum is 32.

The square root of 1325571161 is about 36408.3941008114. The cubic root of 1325571161 is about 1098.5024141155.

The spelling of 1325571161 in words is "one billion, three hundred twenty-five million, five hundred seventy-one thousand, one hundred sixty-one".