2112691 has 4 divisors (see below), whose sum is σ = 2414512. Its totient is φ = 1810872.

The previous prime is 2112683. The next prime is 2112703. The reversal of 2112691 is 1962112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2112691 - 2³ = 2112683 is a prime.

It is a super-2 number, since 2×2112691² = 8926926522962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112601) 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, 150900 + ... + 150913.

It is an arithmetic number, because the mean of its divisors is an integer number (603628).

2^2112691 is an apocalyptic number.

2112691 is a deficient number, since it is larger than the sum of its proper divisors (301821).

2112691 is an equidigital number, since it uses as much as digits as its factorization.

2112691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301820.

The product of its digits is 216, while the sum is 22.

The square root of 2112691 is about 1453.5098898872. The cubic root of 2112691 is about 128.3153641376.

The spelling of 2112691 in words is "two million, one hundred twelve thousand, six hundred ninety-one".