2540618 has 4 divisors (see below), whose sum is σ = 3810930. Its totient is φ = 1270308.

The previous prime is 2540617. The next prime is 2540627. The reversal of 2540618 is 8160452.

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

It can be written as a sum of positive squares in only one way, i.e., 1760929 + 779689 = 1327^2 + 883^2 .

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (2540617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635153 + ... + 635156.

2^2540618 is an apocalyptic number.

2540618 is a deficient number, since it is larger than the sum of its proper divisors (1270312).

2540618 is a wasteful number, since it uses less digits than its factorization.

2540618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270311.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2540618 is about 1593.9316171028. The cubic root of 2540618 is about 136.4519637581.

The spelling of 2540618 in words is "two million, five hundred forty thousand, six hundred eighteen".