2112491 has 4 divisors (see below), whose sum is σ = 2147184. Its totient is φ = 2077800.

The previous prime is 2112469. The next prime is 2112493. The reversal of 2112491 is 1942112.

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

It is a cyclic number.

It is not a de Polignac number, because 2112491 - 2¹⁸ = 1850347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112493) 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, 17255 + ... + 17376.

It is an arithmetic number, because the mean of its divisors is an integer number (536796).

2^2112491 is an apocalyptic number.

2112491 is a deficient number, since it is larger than the sum of its proper divisors (34693).

2112491 is an equidigital number, since it uses as much as digits as its factorization.

2112491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34692.

The product of its digits is 144, while the sum is 20.

The square root of 2112491 is about 1453.4410892774. The cubic root of 2112491 is about 128.3113149759.

The spelling of 2112491 in words is "two million, one hundred twelve thousand, four hundred ninety-one".