2190491 has 8 divisors (see below), whose sum is σ = 2380800. Its totient is φ = 2007720.

The previous prime is 2190481. The next prime is 2190499. The reversal of 2190491 is 1940912.

2190491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2190491 - 2⁶ = 2190427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2190491.

It is not an unprimeable number, because it can be changed into a prime (2190499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271 + ... + 2448.

It is an arithmetic number, because the mean of its divisors is an integer number (297600).

2^2190491 is an apocalyptic number.

2190491 is a deficient number, since it is larger than the sum of its proper divisors (190309).

2190491 is a wasteful number, since it uses less digits than its factorization.

2190491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2190491 is about 1480.0307429239. The cubic root of 2190491 is about 129.8714903625.

The spelling of 2190491 in words is "two million, one hundred ninety thousand, four hundred ninety-one".