1230105191 has 4 divisors (see below), whose sum is σ = 1405834512. Its totient is φ = 1054375872.

The previous prime is 1230105187. The next prime is 1230105259. The reversal of 1230105191 is 1915010321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1915010321 = 7 ⋅273572903.

It is a cyclic number.

It is not a de Polignac number, because 1230105191 - 2² = 1230105187 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 (1230105161) 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, 87864650 + ... + 87864663.

It is an arithmetic number, because the mean of its divisors is an integer number (351458628).

Almost surely, 2^1230105191 is an apocalyptic number.

1230105191 is a deficient number, since it is larger than the sum of its proper divisors (175729321).

1230105191 is an equidigital number, since it uses as much as digits as its factorization.

1230105191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175729320.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 1230105191 is about 35072.8554725731. The cubic root of 1230105191 is about 1071.4718124457.

The spelling of 1230105191 in words is "one billion, two hundred thirty million, one hundred five thousand, one hundred ninety-one".