2499399 has 24 divisors (see below), whose sum is σ = 4178720. Its totient is φ = 1410048.

The previous prime is 2499389. The next prime is 2499403. The reversal of 2499399 is 9939942.

It is not a de Polignac number, because 2499399 - 2⁴ = 2499383 is a prime.

It is a super-2 number, since 2×2499399² = 12493990722402, which contains 22 as substring.

2499399 is a lucky number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5907 + ... + 6315.

2^2499399 is an apocalyptic number.

2499399 is a deficient number, since it is larger than the sum of its proper divisors (1679321).

2499399 is a wasteful number, since it uses less digits than its factorization.

2499399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 516 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 2499399 is about 1580.9487657733. The cubic root of 2499399 is about 135.7100041915.

The spelling of 2499399 in words is "two million, four hundred ninety-nine thousand, three hundred ninety-nine".