1399507 has 2 divisors, whose sum is σ = 1399508. Its totient is φ = 1399506.

The previous prime is 1399499. The next prime is 1399513. The reversal of 1399507 is 7059931.

It is a strong prime.

It is an emirp because it is prime and its reverse (7059931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1399507 - 2³ = 1399499 is a prime.

1399507 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1399537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699753 + 699754.

It is an arithmetic number, because the mean of its divisors is an integer number (699754).

2^1399507 is an apocalyptic number.

1399507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399507 is an equidigital number, since it uses as much as digits as its factorization.

1399507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 1399507 is about 1183.0076077524. The cubic root of 1399507 is about 111.8557613891.

The spelling of 1399507 in words is "one million, three hundred ninety-nine thousand, five hundred seven".