2499843 has 4 divisors (see below), whose sum is σ = 3333128. Its totient is φ = 1666560.

The previous prime is 2499821. The next prime is 2499853. The reversal of 2499843 is 3489942.

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

It is not a de Polignac number, because 2499843 - 2⁶ = 2499779 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (2499803) 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, 416638 + ... + 416643.

It is an arithmetic number, because the mean of its divisors is an integer number (833282).

2^2499843 is an apocalyptic number.

2499843 is a deficient number, since it is larger than the sum of its proper divisors (833285).

2499843 is an equidigital number, since it uses as much as digits as its factorization.

2499843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833284.

The product of its digits is 62208, while the sum is 39.

The square root of 2499843 is about 1581.0891815454. The cubic root of 2499843 is about 135.7180396798.

Subtracting 2499843 from its reverse (3489942), we obtain a palindrome (990099).

The spelling of 2499843 in words is "two million, four hundred ninety-nine thousand, eight hundred forty-three".