1002399 has 4 divisors (see below), whose sum is σ = 1336536. Its totient is φ = 668264.

The previous prime is 1002377. The next prime is 1002403. The reversal of 1002399 is 9932001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002399 - 2⁸ = 1002143 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167064 + ... + 167069.

It is an arithmetic number, because the mean of its divisors is an integer number (334134).

2^1002399 is an apocalyptic number.

1002399 is a deficient number, since it is larger than the sum of its proper divisors (334137).

1002399 is an equidigital number, since it uses as much as digits as its factorization.

1002399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334136.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1002399 is about 1001.1987814615. The cubic root of 1002399 is about 100.0799028051.

The spelling of 1002399 in words is "one million, two thousand, three hundred ninety-nine".