1245617 has 2 divisors, whose sum is σ = 1245618. Its totient is φ = 1245616.

The previous prime is 1245613. The next prime is 1245619. The reversal of 1245617 is 7165421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 703921 + 541696 = 839^2 + 736^2 .

It is an emirp because it is prime and its reverse (7165421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245617 - 2² = 1245613 is a prime.

Together with 1245619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245613) 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, 622808 + 622809.

It is an arithmetic number, because the mean of its divisors is an integer number (622809).

2^1245617 is an apocalyptic number.

It is an amenable number.

1245617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245617 is an equidigital number, since it uses as much as digits as its factorization.

1245617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 1245617 is about 1116.0721302855. The cubic root of 1245617 is about 107.5956818930.

The spelling of 1245617 in words is "one million, two hundred forty-five thousand, six hundred seventeen".