2190841 has 4 divisors (see below), whose sum is σ = 2319732. Its totient is φ = 2061952.

The previous prime is 2190829. The next prime is 2190857. The reversal of 2190841 is 1480912.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1679616 + 511225 = 1296^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190841 - 2⁵ = 2190809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64420 + ... + 64453.

It is an arithmetic number, because the mean of its divisors is an integer number (579933).

2^2190841 is an apocalyptic number.

It is an amenable number.

2190841 is a deficient number, since it is larger than the sum of its proper divisors (128891).

2190841 is a wasteful number, since it uses less digits than its factorization.

2190841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128890.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2190841 is about 1480.1489789883. The cubic root of 2190841 is about 129.8784070159.

The spelling of 2190841 in words is "two million, one hundred ninety thousand, eight hundred forty-one".