2642861 has 8 divisors (see below), whose sum is σ = 2970240. Its totient is φ = 2333232.

The previous prime is 2642839. The next prime is 2642863. The reversal of 2642861 is 1682462.

2642861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2642861 - 2⁶ = 2642797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642863) 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 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 4718.

It is an arithmetic number, because the mean of its divisors is an integer number (371280).

2^2642861 is an apocalyptic number.

It is an amenable number.

2642861 is a deficient number, since it is larger than the sum of its proper divisors (327379).

2642861 is a wasteful number, since it uses less digits than its factorization.

2642861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8875.

The product of its digits is 4608, while the sum is 29.

The square root of 2642861 is about 1625.6878544173. The cubic root of 2642861 is about 138.2583726387.

It can be divided in two parts, 264 and 2861, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2642861 in words is "two million, six hundred forty-two thousand, eight hundred sixty-one".