191241241 has 3 divisors (see below), whose sum is σ = 191255071. Its totient is φ = 191227412.

The previous prime is 191241209. The next prime is 191241257. The reversal of 191241241 is 142142191.

The square root of 191241241 is 13829.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 142142191 = 467 ⋅304373.

It can be written as a sum of positive squares in only one way, i.e., 28933641 + 162307600 = 5379^2 + 12740^2 .

It is not a de Polignac number, because 191241241 - 2⁵ = 191241209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191941241) 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 in 2 ways as a sum of consecutive naturals, for example, 6915 + ... + 20743.

Almost surely, 2^191241241 is an apocalyptic number.

191241241 is the 13829-th square number.

191241241 is the 6915-th centered octagonal number.

It is an amenable number.

191241241 is a deficient number, since it is larger than the sum of its proper divisors (13830).

191241241 is an frugal number, since it uses more digits than its factorization.

191241241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27658 (or 13829 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The cubic root of 191241241 is about 576.1388805178.

Multiplying 191241241 by its sum of digits (25), we get a square (4781031025 = 69145²).

Multiplying 191241241 by its product of digits (576), we get a square (110154954816 = 331896²).

The spelling of 191241241 in words is "one hundred ninety-one million, two hundred forty-one thousand, two hundred forty-one".