2667861 has 48 divisors (see below), whose sum is σ = 4852224. Its totient is φ = 1377792.

The previous prime is 2667859. The next prime is 2667871. The reversal of 2667861 is 1687662.

It is a happy number.

2667861 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 2667861 - 2¹ = 2667859 is a prime.

It is a Curzon number.

2667861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667851) 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, 50311 + ... + 50363.

It is an arithmetic number, because the mean of its divisors is an integer number (101088).

2^2667861 is an apocalyptic number.

2667861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2667861 is a deficient number, since it is larger than the sum of its proper divisors (2184363).

2667861 is a wasteful number, since it uses less digits than its factorization.

2667861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 127 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 2667861 is about 1633.3588093251. The cubic root of 2667861 is about 138.6929543922.

The spelling of 2667861 in words is "two million, six hundred sixty-seven thousand, eight hundred sixty-one".