1245613 has 2 divisors, whose sum is σ = 1245614. Its totient is φ = 1245612.

The previous prime is 1245589. The next prime is 1245617. The reversal of 1245613 is 3165421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1225449 + 20164 = 1107^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245613 - 2¹⁷ = 1114541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245617) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622806 + 622807.

It is an arithmetic number, because the mean of its divisors is an integer number (622807).

2^1245613 is an apocalyptic number.

It is an amenable number.

1245613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245613 is an equidigital number, since it uses as much as digits as its factorization.

1245613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 1245613 is about 1116.0703382852. The cubic root of 1245613 is about 107.5955667203.

The spelling of 1245613 in words is "one million, two hundred forty-five thousand, six hundred thirteen".