2291845 has 8 divisors (see below), whose sum is σ = 2772000. Its totient is φ = 1818960.

The previous prime is 2291827. The next prime is 2291851. The reversal of 2291845 is 5481922.

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

It is not a de Polignac number, because 2291845 - 2⁷ = 2291717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 2404.

It is an arithmetic number, because the mean of its divisors is an integer number (346500).

2^2291845 is an apocalyptic number.

It is an amenable number.

2291845 is a deficient number, since it is larger than the sum of its proper divisors (480155).

2291845 is a wasteful number, since it uses less digits than its factorization.

2291845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its digits is 5760, while the sum is 31.

The square root of 2291845 is about 1513.8840774643. The cubic root of 2291845 is about 131.8444180113.

It can be divided in two parts, 2291 and 845, that added together give a square (3136 = 56²).

The spelling of 2291845 in words is "two million, two hundred ninety-one thousand, eight hundred forty-five".