2549999 has 4 divisors (see below), whose sum is σ = 2637960. Its totient is φ = 2462040.

The previous prime is 2549993. The next prime is 2550001. The reversal of 2549999 is 9999452.

2549999 is nontrivially palindromic in base 11.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2549999 is a prime.

It is a Duffinian number.

2549999 is a modest number, since divided by 9999 gives 254 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549993) 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, 43937 + ... + 43994.

It is an arithmetic number, because the mean of its divisors is an integer number (659490).

2^2549999 is an apocalyptic number.

2549999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2549999 is a deficient number, since it is larger than the sum of its proper divisors (87961).

2549999 is an equidigital number, since it uses as much as digits as its factorization.

2549999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87960.

The product of its digits is 262440, while the sum is 47.

The square root of 2549999 is about 1596.8716291550. The cubic root of 2549999 is about 136.6197029459.

The spelling of 2549999 in words is "two million, five hundred forty-nine thousand, nine hundred ninety-nine".