1230191 has 4 divisors (see below), whose sum is σ = 1233312. Its totient is φ = 1227072.

The previous prime is 1230181. The next prime is 1230199. The reversal of 1230191 is 1910321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1910321 = 7 ⋅272903.

It is a cyclic number.

It is not a de Polignac number, because 1230191 - 2⁶ = 1230127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230199) 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, 866 + ... + 1791.

It is an arithmetic number, because the mean of its divisors is an integer number (308328).

2^1230191 is an apocalyptic number.

1230191 is a deficient number, since it is larger than the sum of its proper divisors (3121).

1230191 is an equidigital number, since it uses as much as digits as its factorization.

1230191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1230191 is about 1109.1397567484. The cubic root of 1230191 is about 107.1496726247.

It can be divided in two parts, 12 and 30191, that added together give a palindrome (30203).

The spelling of 1230191 in words is "one million, two hundred thirty thousand, one hundred ninety-one".