1145775391 has 2 divisors, whose sum is σ = 1145775392. Its totient is φ = 1145775390.

The previous prime is 1145775347. The next prime is 1145775427. The reversal of 1145775391 is 1935775411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1145775391 - 2¹⁵ = 1145742623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145775341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572887695 + 572887696.

It is an arithmetic number, because the mean of its divisors is an integer number (572887696).

Almost surely, 2^1145775391 is an apocalyptic number.

1145775391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145775391 is an equidigital number, since it uses as much as digits as its factorization.

1145775391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 43.

The square root of 1145775391 is about 33849.3041435123. The cubic root of 1145775391 is about 1046.4050576224.

The spelling of 1145775391 in words is "one billion, one hundred forty-five million, seven hundred seventy-five thousand, three hundred ninety-one".