1325172791 has 2 divisors, whose sum is σ = 1325172792. Its totient is φ = 1325172790.

The previous prime is 1325172701. The next prime is 1325172799. The reversal of 1325172791 is 1972715231.

It is a strong prime.

It is an emirp because it is prime and its reverse (1972715231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1325172791 - 2²⁶ = 1258063927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325172799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662586395 + 662586396.

It is an arithmetic number, because the mean of its divisors is an integer number (662586396).

Almost surely, 2^1325172791 is an apocalyptic number.

1325172791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325172791 is an equidigital number, since it uses as much as digits as its factorization.

1325172791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 1325172791 is about 36402.9228359482. The cubic root of 1325172791 is about 1098.3923598574.

The spelling of 1325172791 in words is "one billion, three hundred twenty-five million, one hundred seventy-two thousand, seven hundred ninety-one".