197281 has 4 divisors (see below), whose sum is σ = 225472. Its totient is φ = 169092.

The previous prime is 197279. The next prime is 197293. The reversal of 197281 is 182791.

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: 182791 = 7 ⋅26113.

It is not a de Polignac number, because 197281 - 2¹ = 197279 is a prime.

It is a super-2 number, since 2×197281² = 77839585922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14085 + ... + 14098.

It is an arithmetic number, because the mean of its divisors is an integer number (56368).

2¹⁹⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

197281 is a deficient number, since it is larger than the sum of its proper divisors (28191).

197281 is an equidigital number, since it uses as much as digits as its factorization.

197281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28190.

The product of its digits is 1008, while the sum is 28.

The square root of 197281 is about 444.1632582734. The cubic root of 197281 is about 58.2141311836.

The spelling of 197281 in words is "one hundred ninety-seven thousand, two hundred eighty-one".