1325737921 has 2 divisors, whose sum is σ = 1325737922. Its totient is φ = 1325737920.

The previous prime is 1325737879. The next prime is 1325737961. The reversal of 1325737921 is 1297375231.

It is an a-pointer prime, because the next prime (1325737961) can be obtained adding 1325737921 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1315077696 + 10660225 = 36264^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325737921 - 2⁷ = 1325737793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1325737961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662868960 + 662868961.

It is an arithmetic number, because the mean of its divisors is an integer number (662868961).

Almost surely, 2^1325737921 is an apocalyptic number.

It is an amenable number.

1325737921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325737921 is an equidigital number, since it uses as much as digits as its factorization.

1325737921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 1325737921 is about 36410.6841600100. The cubic root of 1325737921 is about 1098.5484769214.

The spelling of 1325737921 in words is "one billion, three hundred twenty-five million, seven hundred thirty-seven thousand, nine hundred twenty-one".