2136881 has 4 divisors (see below), whose sum is σ = 2144064. Its totient is φ = 2129700.

The previous prime is 2136877. The next prime is 2136889. The reversal of 2136881 is 1886312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2136881 - 2² = 2136877 is a prime.

It is a super-2 number, since 2×2136881² = 9132520816322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2136889) 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, 3125 + ... + 3746.

It is an arithmetic number, because the mean of its divisors is an integer number (536016).

2^2136881 is an apocalyptic number.

It is an amenable number.

2136881 is a deficient number, since it is larger than the sum of its proper divisors (7183).

2136881 is an equidigital number, since it uses as much as digits as its factorization.

2136881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its digits is 2304, while the sum is 29.

The square root of 2136881 is about 1461.8074428597. The cubic root of 2136881 is about 128.8032374802.

The spelling of 2136881 in words is "two million, one hundred thirty-six thousand, eight hundred eighty-one".