1325511949 has 2 divisors, whose sum is σ = 1325511950. Its totient is φ = 1325511948.

The previous prime is 1325511911. The next prime is 1325511959. The reversal of 1325511949 is 9491155231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 914639049 + 410872900 = 30243^2 + 20270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325511949 - 2²³ = 1317123341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1325511959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662755974 + 662755975.

It is an arithmetic number, because the mean of its divisors is an integer number (662755975).

Almost surely, 2^1325511949 is an apocalyptic number.

It is an amenable number.

1325511949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325511949 is an equidigital number, since it uses as much as digits as its factorization.

1325511949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 40.

The square root of 1325511949 is about 36407.5809276035. The cubic root of 1325511949 is about 1098.4860575201.

The spelling of 1325511949 in words is "one billion, three hundred twenty-five million, five hundred eleven thousand, nine hundred forty-nine".