2491145 has 8 divisors (see below), whose sum is σ = 2997960. Its totient is φ = 1987200.

The previous prime is 2491123. The next prime is 2491171. The reversal of 2491145 is 5411942.

It can be written as a sum of positive squares in 4 ways, for example, as 674041 + 1817104 = 821^2 + 1348^2 .

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

It is not a de Polignac number, because 2491145 - 2⁶ = 2491081 is a prime.

It is a super-2 number, since 2×2491145² = 12411606822050, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2591 + ... + 3419.

It is an arithmetic number, because the mean of its divisors is an integer number (374745).

2^2491145 is an apocalyptic number.

It is an amenable number.

2491145 is a deficient number, since it is larger than the sum of its proper divisors (506815).

2491145 is an equidigital number, since it uses as much as digits as its factorization.

2491145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435.

The product of its digits is 1440, while the sum is 26.

The square root of 2491145 is about 1578.3361492407. The cubic root of 2491145 is about 135.5604501453.

The spelling of 2491145 in words is "two million, four hundred ninety-one thousand, one hundred forty-five".