2861867 has 4 divisors (see below), whose sum is σ = 2986320. Its totient is φ = 2737416.

The previous prime is 2861861. The next prime is 2861869. The reversal of 2861867 is 7681682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2861867 - 2⁴ = 2861851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2861867.

It is not an unprimeable number, because it can be changed into a prime (2861861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62192 + ... + 62237.

It is an arithmetic number, because the mean of its divisors is an integer number (746580).

2^2861867 is an apocalyptic number.

2861867 is a deficient number, since it is larger than the sum of its proper divisors (124453).

2861867 is a wasteful number, since it uses less digits than its factorization.

2861867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124452.

The product of its digits is 32256, while the sum is 38.

The square root of 2861867 is about 1691.7053525954. The cubic root of 2861867 is about 141.9765054034.

The spelling of 2861867 in words is "two million, eight hundred sixty-one thousand, eight hundred sixty-seven".