191266 has 4 divisors (see below), whose sum is σ = 286902. Its totient is φ = 95632.

The previous prime is 191251. The next prime is 191281. The reversal of 191266 is 662191.

191266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (191251) and next prime (191281).

It can be written as a sum of positive squares in only one way, i.e., 184041 + 7225 = 429^2 + 85^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 191266.

It is an unprimeable number.

191266 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47815 + ... + 47818.

2¹⁹¹²⁶⁶ is an apocalyptic number.

191266 is a deficient number, since it is larger than the sum of its proper divisors (95636).

191266 is an equidigital number, since it uses as much as digits as its factorization.

191266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95635.

The product of its digits is 648, while the sum is 25.

The square root of 191266 is about 437.3396849132. The cubic root of 191266 is about 57.6163742671.

The spelling of 191266 in words is "one hundred ninety-one thousand, two hundred sixty-six".