2549618 has 16 divisors (see below), whose sum is σ = 3965760. Its totient is φ = 1228656.

The previous prime is 2549611. The next prime is 2549621. The reversal of 2549618 is 8169452.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2549611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6923 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (247860).

2^2549618 is an apocalyptic number.

2549618 is the 854-th centered heptagonal number.

2549618 is a deficient number, since it is larger than the sum of its proper divisors (1416142).

2549618 is a wasteful number, since it uses less digits than its factorization.

2549618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481.

The product of its digits is 17280, while the sum is 35.

The square root of 2549618 is about 1596.7523289477. The cubic root of 2549618 is about 136.6128984074.

The spelling of 2549618 in words is "two million, five hundred forty-nine thousand, six hundred eighteen".