194245 has 8 divisors (see below), whose sum is σ = 237816. Its totient is φ = 152256.

The previous prime is 194239. The next prime is 194263. The reversal of 194245 is 542491.

It can be written as a sum of positive squares in 4 ways, for example, as 91204 + 103041 = 302^2 + 321^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194245 is a prime.

It is a super-2 number, since 2×194245² = 75462240050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 102 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (29727).

194245 is a Friedman number, since it can be written as 21^4-59*4, using all its digits and the basic arithmetic operations.

2¹⁹⁴²⁴⁵ is an apocalyptic number.

It is an amenable number.

194245 is a deficient number, since it is larger than the sum of its proper divisors (43571).

194245 is an equidigital number, since it uses as much as digits as its factorization.

194245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791.

The product of its digits is 1440, while the sum is 25.

The square root of 194245 is about 440.7323450803. The cubic root of 194245 is about 57.9139628041.

The spelling of 194245 in words is "one hundred ninety-four thousand, two hundred forty-five".