2116491 has 8 divisors (see below), whose sum is σ = 3039120. Its totient is φ = 1302432.

The previous prime is 2116487. The next prime is 2116501. The reversal of 2116491 is 1946112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2116491 - 2² = 2116487 is a prime.

2116491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2116441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27096 + ... + 27173.

It is an arithmetic number, because the mean of its divisors is an integer number (379890).

2^2116491 is an apocalyptic number.

2116491 is a deficient number, since it is larger than the sum of its proper divisors (922629).

2116491 is a wasteful number, since it uses less digits than its factorization.

2116491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54285.

The product of its digits is 432, while the sum is 24.

The square root of 2116491 is about 1454.8164832720. The cubic root of 2116491 is about 128.3922497045.

The spelling of 2116491 in words is "two million, one hundred sixteen thousand, four hundred ninety-one".