1145775461 has 2 divisors, whose sum is σ = 1145775462. Its totient is φ = 1145775460.

The previous prime is 1145775439. The next prime is 1145775517. The reversal of 1145775461 is 1645775411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082015236 + 63760225 = 32894^2 + 7985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145775461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145775161) 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, 572887730 + 572887731.

It is an arithmetic number, because the mean of its divisors is an integer number (572887731).

Almost surely, 2^1145775461 is an apocalyptic number.

It is an amenable number.

1145775461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145775461 is an equidigital number, since it uses as much as digits as its factorization.

1145775461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 41.

The square root of 1145775461 is about 33849.3051775070. The cubic root of 1145775461 is about 1046.4050789320.

The spelling of 1145775461 in words is "one billion, one hundred forty-five million, seven hundred seventy-five thousand, four hundred sixty-one".