2861145 has 48 divisors (see below), whose sum is σ = 5870592. Its totient is φ = 1261440.

The previous prime is 2861137. The next prime is 2861147. The reversal of 2861145 is 5411682.

2861145 is a `hidden beast` number, since 2 + 8 + 611 + 45 = 666.

2861145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2861145 - 2³ = 2861137 is a prime.

It is a super-2 number, since 2×2861145² = 16372301422050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2861147) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 9619 + ... + 9911.

It is an arithmetic number, because the mean of its divisors is an integer number (122304).

2^2861145 is an apocalyptic number.

It is an amenable number.

2861145 is an abundant number, since it is smaller than the sum of its proper divisors (3009447).

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

2861145 is a wasteful number, since it uses less digits than its factorization.

2861145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 339 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2861145 is about 1691.4919450000. The cubic root of 2861145 is about 141.9645649861.

It can be divided in two parts, 286 and 1145, that added together give a triangular number (1431 = T₅₃).

The spelling of 2861145 in words is "two million, eight hundred sixty-one thousand, one hundred forty-five".