2045851 has 2 divisors, whose sum is σ = 2045852. Its totient is φ = 2045850.

The previous prime is 2045839. The next prime is 2045881. The reversal of 2045851 is 1585402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2045851 - 2⁵ = 2045819 is a prime.

2045851 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2045881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022925 + 1022926.

It is an arithmetic number, because the mean of its divisors is an integer number (1022926).

2^2045851 is an apocalyptic number.

2045851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045851 is an equidigital number, since it uses as much as digits as its factorization.

2045851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2045851 is about 1430.3324788314. The cubic root of 2045851 is about 126.9476503197.

The spelling of 2045851 in words is "two million, forty-five thousand, eight hundred fifty-one".