1330881257 has 2 divisors, whose sum is σ = 1330881258. Its totient is φ = 1330881256.

The previous prime is 1330881241. The next prime is 1330881263. The reversal of 1330881257 is 7521880331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1228081936 + 102799321 = 35044^2 + 10139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330881257 - 2⁴ = 1330881241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1330881257.

It is not a weakly prime, because it can be changed into another prime (1330881217) 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, 665440628 + 665440629.

It is an arithmetic number, because the mean of its divisors is an integer number (665440629).

Almost surely, 2^1330881257 is an apocalyptic number.

It is an amenable number.

1330881257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330881257 is an equidigital number, since it uses as much as digits as its factorization.

1330881257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1330881257 is about 36481.2452775395. The cubic root of 1330881257 is about 1099.9672874569.

The spelling of 1330881257 in words is "one billion, three hundred thirty million, eight hundred eighty-one thousand, two hundred fifty-seven".