2860861 has 4 divisors (see below), whose sum is σ = 2871324. Its totient is φ = 2850400.

The previous prime is 2860853. The next prime is 2860883. The reversal of 2860861 is 1680682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1680682 = 2 ⋅840341.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 1038361 = 1350^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 2860861 - 2³ = 2860853 is a prime.

It is a super-2 number, since 2×2860861² = 16369051322642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2860801) 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, 4810 + ... + 5371.

It is an arithmetic number, because the mean of its divisors is an integer number (717831).

2^2860861 is an apocalyptic number.

It is an amenable number.

2860861 is a deficient number, since it is larger than the sum of its proper divisors (10463).

2860861 is a wasteful number, since it uses less digits than its factorization.

2860861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2860861 is about 1691.4079933594. The cubic root of 2860861 is about 141.9598676510.

It can be divided in two parts, 2860 and 861, that added together give a square (3721 = 61²).

The spelling of 2860861 in words is "two million, eight hundred sixty thousand, eight hundred sixty-one".