194521 has 2 divisors, whose sum is σ = 194522. Its totient is φ = 194520.

The previous prime is 194507. The next prime is 194527. The reversal of 194521 is 125491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 25600 = 411^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 194521 - 2¹⁵ = 161753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194492 and 194501.

It is not a weakly prime, because it can be changed into another prime (194527) 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 as a sum of consecutive naturals, namely, 97260 + 97261.

It is an arithmetic number, because the mean of its divisors is an integer number (97261).

194521 is a Friedman number, since it can be written as 21^4+5*(9-1), using all its digits and the basic arithmetic operations.

2¹⁹⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

194521 is a deficient number, since it is larger than the sum of its proper divisors (1).

194521 is an equidigital number, since it uses as much as digits as its factorization.

194521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 194521 is about 441.0453491422. The cubic root of 194521 is about 57.9413795358.

The spelling of 194521 in words is "one hundred ninety-four thousand, five hundred twenty-one".