2137861 has 16 divisors (see below), whose sum is σ = 2514240. Its totient is φ = 1797120.

The previous prime is 2137859. The next prime is 2137871. The reversal of 2137861 is 1687312.

It is a cyclic number.

It is not a de Polignac number, because 2137861 - 2¹ = 2137859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10981 + ... + 11173.

It is an arithmetic number, because the mean of its divisors is an integer number (157140).

2^2137861 is an apocalyptic number.

It is an amenable number.

2137861 is a deficient number, since it is larger than the sum of its proper divisors (376379).

2137861 is a wasteful number, since it uses less digits than its factorization.

2137861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276.

The product of its digits is 2016, while the sum is 28.

The square root of 2137861 is about 1462.1426059041. The cubic root of 2137861 is about 128.8229247224.

The spelling of 2137861 in words is "two million, one hundred thirty-seven thousand, eight hundred sixty-one".