1245557713 has 2 divisors, whose sum is σ = 1245557714. Its totient is φ = 1245557712.

The previous prime is 1245557701. The next prime is 1245557723. The reversal of 1245557713 is 3177555421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232220609 + 13337104 = 35103^2 + 3652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245557713 - 2⁵ = 1245557681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245557723) 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, 622778856 + 622778857.

It is an arithmetic number, because the mean of its divisors is an integer number (622778857).

Almost surely, 2^1245557713 is an apocalyptic number.

It is an amenable number.

1245557713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245557713 is an equidigital number, since it uses as much as digits as its factorization.

1245557713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147000, while the sum is 40.

The square root of 1245557713 is about 35292.4597187558. The cubic root of 1245557713 is about 1075.9397480692.

The spelling of 1245557713 in words is "one billion, two hundred forty-five million, five hundred fifty-seven thousand, seven hundred thirteen".