1390299 has 4 divisors (see below), whose sum is σ = 1853736. Its totient is φ = 926864.

The previous prime is 1390297. The next prime is 1390309. The reversal of 1390299 is 9920931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9920931 = 3 ⋅3306977.

It is a cyclic number.

It is not a de Polignac number, because 1390299 - 2¹ = 1390297 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1390297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231714 + ... + 231719.

It is an arithmetic number, because the mean of its divisors is an integer number (463434).

2^1390299 is an apocalyptic number.

1390299 is a deficient number, since it is larger than the sum of its proper divisors (463437).

1390299 is an equidigital number, since it uses as much as digits as its factorization.

1390299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463436.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 1390299 is about 1179.1094096817. The cubic root of 1390299 is about 111.6099045692.

The spelling of 1390299 in words is "one million, three hundred ninety thousand, two hundred ninety-nine".