1625717 has 2 divisors, whose sum is σ = 1625718. Its totient is φ = 1625716.

The previous prime is 1625707. The next prime is 1625719. The reversal of 1625717 is 7175261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 835396 + 790321 = 914^2 + 889^2 .

It is an emirp because it is prime and its reverse (7175261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1625717 - 2⁸ = 1625461 is a prime.

Together with 1625719, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1625717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812858 + 812859.

It is an arithmetic number, because the mean of its divisors is an integer number (812859).

2^1625717 is an apocalyptic number.

It is an amenable number.

1625717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625717 is an equidigital number, since it uses as much as digits as its factorization.

1625717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 29.

The square root of 1625717 is about 1275.0360779209. The cubic root of 1625717 is about 117.5840231971.

The spelling of 1625717 in words is "one million, six hundred twenty-five thousand, seven hundred seventeen".