1145201081 has 2 divisors, whose sum is σ = 1145201082. Its totient is φ = 1145201080.

The previous prime is 1145201017. The next prime is 1145201089. The reversal of 1145201081 is 1801025411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101177856 + 44023225 = 33184^2 + 6635^2 .

It is an emirp because it is prime and its reverse (1801025411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145201081 - 2⁶ = 1145201017 is a prime.

It is a super-2 number, since 2×1145201081² = 2622971031847137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1145201089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572600540 + 572600541.

It is an arithmetic number, because the mean of its divisors is an integer number (572600541).

Almost surely, 2^1145201081 is an apocalyptic number.

It is an amenable number.

1145201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145201081 is an equidigital number, since it uses as much as digits as its factorization.

1145201081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 1145201081 is about 33840.8197447993. The cubic root of 1145201081 is about 1046.2301945761.

Adding to 1145201081 its reverse (1801025411), we get a palindrome (2946226492).

The spelling of 1145201081 in words is "one billion, one hundred forty-five million, two hundred one thousand, eighty-one".