2491045 has 4 divisors (see below), whose sum is σ = 2989260. Its totient is φ = 1992832.

The previous prime is 2491043. The next prime is 2491063. The reversal of 2491045 is 5401942.

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 850084 + 1640961 = 922^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491045 - 2¹ = 2491043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249100 + ... + 249109.

It is an arithmetic number, because the mean of its divisors is an integer number (747315).

2^2491045 is an apocalyptic number.

It is an amenable number.

2491045 is a deficient number, since it is larger than the sum of its proper divisors (498215).

2491045 is an equidigital number, since it uses as much as digits as its factorization.

2491045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498214.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2491045 is about 1578.3044699930. The cubic root of 2491045 is about 135.5586362235.

Adding to 2491045 its reverse (5401942), we get a palindrome (7892987).

The spelling of 2491045 in words is "two million, four hundred ninety-one thousand, forty-five".