1225034191 has 2 divisors, whose sum is σ = 1225034192. Its totient is φ = 1225034190.

The previous prime is 1225034189. The next prime is 1225034197. The reversal of 1225034191 is 1914305221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225034191 - 2¹ = 1225034189 is a prime.

Together with 1225034189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225034197) 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 as a sum of consecutive naturals, namely, 612517095 + 612517096.

It is an arithmetic number, because the mean of its divisors is an integer number (612517096).

Almost surely, 2^1225034191 is an apocalyptic number.

1225034191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225034191 is an equidigital number, since it uses as much as digits as its factorization.

1225034191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1225034191 is about 35000.4884394490. The cubic root of 1225034191 is about 1069.9974352866.

The spelling of 1225034191 in words is "one billion, two hundred twenty-five million, thirty-four thousand, one hundred ninety-one".