194257 has 4 divisors (see below), whose sum is σ = 222016. Its totient is φ = 166500.

The previous prime is 194239. The next prime is 194263. The reversal of 194257 is 752491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 752491 = 23 ⋅32717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194267) 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 3 ways as a sum of consecutive naturals, for example, 13869 + ... + 13882.

It is an arithmetic number, because the mean of its divisors is an integer number (55504).

2¹⁹⁴²⁵⁷ is an apocalyptic number.

It is an amenable number.

194257 is a deficient number, since it is larger than the sum of its proper divisors (27759).

194257 is an equidigital number, since it uses as much as digits as its factorization.

194257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27758.

The product of its digits is 2520, while the sum is 28.

The square root of 194257 is about 440.7459585748. The cubic root of 194257 is about 57.9151553758.

The spelling of 194257 in words is "one hundred ninety-four thousand, two hundred fifty-seven".