2861172 has 72 divisors (see below), whose sum is σ = 7862400. Its totient is φ = 874368.

The previous prime is 2861161. The next prime is 2861189. The reversal of 2861172 is 2711682.

2861172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32104 + ... + 32192.

It is an arithmetic number, because the mean of its divisors is an integer number (109200).

2^2861172 is an apocalyptic number.

It is a pronic number, being equal to 1691×1692.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3931200).

2861172 is an abundant number, since it is smaller than the sum of its proper divisors (5001228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2861172 is a wasteful number, since it uses less digits than its factorization.

2861172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 160 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2861172 is about 1691.4999261011. The cubic root of 2861172 is about 141.9650115476.

The spelling of 2861172 in words is "two million, eight hundred sixty-one thousand, one hundred seventy-two".