2640841 has 4 divisors (see below), whose sum is σ = 3018112. Its totient is φ = 2263572.

The previous prime is 2640823. The next prime is 2640853. The reversal of 2640841 is 1480462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2640841 - 2⁷ = 2640713 is a prime.

It is a Duffinian number.

2640841 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2640821) 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, 188625 + ... + 188638.

It is an arithmetic number, because the mean of its divisors is an integer number (754528).

2^2640841 is an apocalyptic number.

It is an amenable number.

2640841 is a deficient number, since it is larger than the sum of its proper divisors (377271).

2640841 is an equidigital number, since it uses as much as digits as its factorization.

2640841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377270.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2640841 is about 1625.0664601794. The cubic root of 2640841 is about 138.2231389662.

It can be divided in two parts, 2640 and 841, that added together give a square (3481 = 59²).

The spelling of 2640841 in words is "two million, six hundred forty thousand, eight hundred forty-one".