1275204089 has 2 divisors, whose sum is σ = 1275204090. Its totient is φ = 1275204088.

The previous prime is 1275204071. The next prime is 1275204101. The reversal of 1275204089 is 9804025721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134544489 + 140659600 = 33683^2 + 11860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275204089 is a prime.

It is a super-2 number, since 2×1275204089² = 3252290937204639842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1275204059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637602044 + 637602045.

It is an arithmetic number, because the mean of its divisors is an integer number (637602045).

Almost surely, 2^1275204089 is an apocalyptic number.

It is an amenable number.

1275204089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275204089 is an equidigital number, since it uses as much as digits as its factorization.

1275204089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1275204089 is about 35709.9998459815. Note that the first 3 decimals coincide. The cubic root of 1275204089 is about 1084.4092968459.

The spelling of 1275204089 in words is "one billion, two hundred seventy-five million, two hundred four thousand, eighty-nine".