2855917 has 4 divisors (see below), whose sum is σ = 2867040. Its totient is φ = 2844796.

The previous prime is 2855911. The next prime is 2855927. The reversal of 2855917 is 7195582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2855917 - 2¹¹ = 2853869 is a prime.

It is a Duffinian number.

2855917 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5167 + ... + 5692.

It is an arithmetic number, because the mean of its divisors is an integer number (716760).

2^2855917 is an apocalyptic number.

It is an amenable number.

2855917 is a deficient number, since it is larger than the sum of its proper divisors (11123).

2855917 is a wasteful number, since it uses less digits than its factorization.

2855917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122.

The product of its digits is 25200, while the sum is 37.

The square root of 2855917 is about 1689.9458571209. The cubic root of 2855917 is about 141.8780444662.

It can be divided in two parts, 28 and 55917, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 2855917 in words is "two million, eight hundred fifty-five thousand, nine hundred seventeen".