2045391 has 8 divisors (see below), whose sum is σ = 2772144. Its totient is φ = 1341120.

The previous prime is 2045377. The next prime is 2045437. The reversal of 2045391 is 1935402.

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

It is not a de Polignac number, because 2045391 - 2⁵ = 2045359 is a prime.

2045391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5406 + ... + 5771.

It is an arithmetic number, because the mean of its divisors is an integer number (346518).

2^2045391 is an apocalyptic number.

2045391 is a deficient number, since it is larger than the sum of its proper divisors (726753).

2045391 is a wasteful number, since it uses less digits than its factorization.

2045391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2045391 is about 1430.1716680175. The cubic root of 2045391 is about 126.9381350786.

The spelling of 2045391 in words is "two million, forty-five thousand, three hundred ninety-one".