2490109 has 4 divisors (see below), whose sum is σ = 2636604. Its totient is φ = 2343616.

The previous prime is 2490101. The next prime is 2490119. The reversal of 2490109 is 9010942.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1932100 + 558009 = 1390^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 2490109 - 2³ = 2490101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73222 + ... + 73255.

It is an arithmetic number, because the mean of its divisors is an integer number (659151).

2^2490109 is an apocalyptic number.

It is an amenable number.

2490109 is a deficient number, since it is larger than the sum of its proper divisors (146495).

2490109 is a wasteful number, since it uses less digits than its factorization.

2490109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146494.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2490109 is about 1578.0079213996. The cubic root of 2490109 is about 135.5416555616.

Subtracting from 2490109 its sum of digits (25), we obtain a square (2490084 = 1578²).

The spelling of 2490109 in words is "two million, four hundred ninety thousand, one hundred nine".