1325178397 has 2 divisors, whose sum is σ = 1325178398. Its totient is φ = 1325178396.

The previous prime is 1325178341. The next prime is 1325178433. The reversal of 1325178397 is 7938715231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074462841 + 250715556 = 32779^2 + 15834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325178397 - 2⁷ = 1325178269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325178307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662589198 + 662589199.

It is an arithmetic number, because the mean of its divisors is an integer number (662589199).

Almost surely, 2^1325178397 is an apocalyptic number.

It is an amenable number.

1325178397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325178397 is an equidigital number, since it uses as much as digits as its factorization.

1325178397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 1325178397 is about 36402.9998351784. Note that the first 3 decimals coincide. The cubic root of 1325178397 is about 1098.3939087319.

The spelling of 1325178397 in words is "one billion, three hundred twenty-five million, one hundred seventy-eight thousand, three hundred ninety-seven".