2549865 has 8 divisors (see below), whose sum is σ = 4079808. Its totient is φ = 1359920.

The previous prime is 2549863. The next prime is 2549867. The reversal of 2549865 is 5689452.

2549865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2549863) and next prime (2549867).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2549865 - 2¹ = 2549863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2549863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84981 + ... + 85010.

It is an arithmetic number, because the mean of its divisors is an integer number (509976).

2^2549865 is an apocalyptic number.

It is an amenable number.

2549865 is a deficient number, since it is larger than the sum of its proper divisors (1529943).

2549865 is a wasteful number, since it uses less digits than its factorization.

2549865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169999.

The product of its digits is 86400, while the sum is 39.

The square root of 2549865 is about 1596.8296715680. The cubic root of 2549865 is about 136.6173098259.

The spelling of 2549865 in words is "two million, five hundred forty-nine thousand, eight hundred sixty-five".