2180491 has 2 divisors, whose sum is σ = 2180492. Its totient is φ = 2180490.

The previous prime is 2180467. The next prime is 2180501. The reversal of 2180491 is 1940812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2180491 - 2¹¹ = 2178443 is a prime.

It is not a weakly prime, because it can be changed into another prime (2184491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090245 + 1090246.

It is an arithmetic number, because the mean of its divisors is an integer number (1090246).

2^2180491 is an apocalyptic number.

2180491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180491 is an equidigital number, since it uses as much as digits as its factorization.

2180491 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2180491 is about 1476.6485702428. The cubic root of 2180491 is about 129.6735596667.

The spelling of 2180491 in words is "two million, one hundred eighty thousand, four hundred ninety-one".