2851845 has 16 divisors (see below), whose sum is σ = 4710912. Its totient is φ = 1471680.

The previous prime is 2851841. The next prime is 2851847. The reversal of 2851845 is 5481582.

It is not a de Polignac number, because 2851845 - 2² = 2851841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2602 + ... + 3531.

It is an arithmetic number, because the mean of its divisors is an integer number (294432).

2^2851845 is an apocalyptic number.

It is an amenable number.

2851845 is a deficient number, since it is larger than the sum of its proper divisors (1859067).

2851845 is a wasteful number, since it uses less digits than its factorization.

2851845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172.

The product of its digits is 12800, while the sum is 33.

The square root of 2851845 is about 1688.7406550445. The cubic root of 2851845 is about 141.8105819324.

It can be divided in two parts, 285 and 1845, that multiplied together give a triangular number (525825 = T₁₀₂₅).

The spelling of 2851845 in words is "two million, eight hundred fifty-one thousand, eight hundred forty-five".