1227032561 has 2 divisors, whose sum is σ = 1227032562. Its totient is φ = 1227032560.

The previous prime is 1227032539. The next prime is 1227032581. The reversal of 1227032561 is 1652307221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 892874161 + 334158400 = 29881^2 + 18280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227032561 - 2³⁰ = 153290737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1227032531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613516280 + 613516281.

It is an arithmetic number, because the mean of its divisors is an integer number (613516281).

Almost surely, 2^1227032561 is an apocalyptic number.

It is an amenable number.

1227032561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227032561 is an equidigital number, since it uses as much as digits as its factorization.

1227032561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1227032561 is about 35029.0245510776. The cubic root of 1227032561 is about 1070.5789399091.

Adding to 1227032561 its reverse (1652307221), we get a palindrome (2879339782).

The spelling of 1227032561 in words is "one billion, two hundred twenty-seven million, thirty-two thousand, five hundred sixty-one".