1226360591 has 2 divisors, whose sum is σ = 1226360592. Its totient is φ = 1226360590.

The previous prime is 1226360581. The next prime is 1226360593. The reversal of 1226360591 is 1950636221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1226360591 is a prime.

Together with 1226360593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226360593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613180295 + 613180296.

It is an arithmetic number, because the mean of its divisors is an integer number (613180296).

Almost surely, 2^1226360591 is an apocalyptic number.

1226360591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226360591 is an equidigital number, since it uses as much as digits as its factorization.

1226360591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1226360591 is about 35019.4316201734. The cubic root of 1226360591 is about 1070.3834742205.

The spelling of 1226360591 in words is "one billion, two hundred twenty-six million, three hundred sixty thousand, five hundred ninety-one".