1191297241 has 8 divisors (see below), whose sum is σ = 1220468480. Its totient is φ = 1162192752.

The previous prime is 1191297221. The next prime is 1191297277. The reversal of 1191297241 is 1427921911.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1191297241 - 2⁵ = 1191297209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1191297241.

It is not an unprimeable number, because it can be changed into a prime (1191297221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20440 + ... + 52918.

It is an arithmetic number, because the mean of its divisors is an integer number (152558560).

Almost surely, 2^1191297241 is an apocalyptic number.

It is an amenable number.

1191297241 is a deficient number, since it is larger than the sum of its proper divisors (29171239).

1191297241 is an equidigital number, since it uses as much as digits as its factorization.

1191297241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33375.

The product of its digits is 9072, while the sum is 37.

The square root of 1191297241 is about 34515.1740688063. The cubic root of 1191297241 is about 1060.0834279298.

The spelling of 1191297241 in words is "one billion, one hundred ninety-one million, two hundred ninety-seven thousand, two hundred forty-one".