2642845 has 8 divisors (see below), whose sum is σ = 3231576. Its totient is φ = 2074176.

The previous prime is 2642839. The next prime is 2642863. The reversal of 2642845 is 5482462.

2642845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 127449 + 2515396 = 357^2 + 1586^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2642845 - 2⁹ = 2642333 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4722 + ... + 5251.

It is an arithmetic number, because the mean of its divisors is an integer number (403947).

2^2642845 is an apocalyptic number.

It is an amenable number.

2642845 is a deficient number, since it is larger than the sum of its proper divisors (588731).

2642845 is an equidigital number, since it uses as much as digits as its factorization.

2642845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10031.

The product of its digits is 15360, while the sum is 31.

The square root of 2642845 is about 1625.6829334160. The cubic root of 2642845 is about 138.2580936307.

The spelling of 2642845 in words is "two million, six hundred forty-two thousand, eight hundred forty-five".