2499881 has 2 divisors, whose sum is σ = 2499882. Its totient is φ = 2499880.

The previous prime is 2499863. The next prime is 2499907. The reversal of 2499881 is 1889942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 3481 = 1580^2 + 59^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2499881 is a prime.

It is a super-2 number, since 2×2499881² = 12498810028322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2499821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249940 + 1249941.

It is an arithmetic number, because the mean of its divisors is an integer number (1249941).

2^2499881 is an apocalyptic number.

It is an amenable number.

2499881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2499881 is an equidigital number, since it uses as much as digits as its factorization.

2499881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 2499881 is about 1581.1011985322. The cubic root of 2499881 is about 135.7187273576.

The spelling of 2499881 in words is "two million, four hundred ninety-nine thousand, eight hundred eighty-one".