2391841 has 4 divisors (see below), whose sum is σ = 2396052. Its totient is φ = 2387632.

The previous prime is 2391827. The next prime is 2391847. The reversal of 2391841 is 1481932.

It is a happy number.

2391841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2235025 + 156816 = 1495^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391841 - 2¹³ = 2383649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2391847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (599013).

2^2391841 is an apocalyptic number.

It is an amenable number.

2391841 is a deficient number, since it is larger than the sum of its proper divisors (4211).

2391841 is an equidigital number, since it uses as much as digits as its factorization.

2391841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210.

The product of its digits is 1728, while the sum is 28.

The square root of 2391841 is about 1546.5577907081. The cubic root of 2391841 is about 133.7346982233.

Subtracting from 2391841 its reverse (1481932), we obtain a palindrome (909909).

It can be divided in two parts, 239 and 1841, that added together give a triangular number (2080 = T₆₄).

The spelling of 2391841 in words is "two million, three hundred ninety-one thousand, eight hundred forty-one".