1399417 has 2 divisors, whose sum is σ = 1399418. Its totient is φ = 1399416.

The previous prime is 1399403. The next prime is 1399427. The reversal of 1399417 is 7149931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1354896 + 44521 = 1164^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399417 - 2¹⁵ = 1366649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699708 + 699709.

It is an arithmetic number, because the mean of its divisors is an integer number (699709).

2^1399417 is an apocalyptic number.

It is an amenable number.

1399417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399417 is an equidigital number, since it uses as much as digits as its factorization.

1399417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 34.

The square root of 1399417 is about 1182.9695685012. The cubic root of 1399417 is about 111.8533635842.

The spelling of 1399417 in words is "one million, three hundred ninety-nine thousand, four hundred seventeen".