1230544561 has 2 divisors, whose sum is σ = 1230544562. Its totient is φ = 1230544560.

The previous prime is 1230544517. The next prime is 1230544573. The reversal of 1230544561 is 1654450321.

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., 637865536 + 592679025 = 25256^2 + 24345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230544561 - 2²³ = 1222155953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230544591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615272280 + 615272281.

It is an arithmetic number, because the mean of its divisors is an integer number (615272281).

Almost surely, 2^1230544561 is an apocalyptic number.

It is an amenable number.

1230544561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230544561 is an equidigital number, since it uses as much as digits as its factorization.

1230544561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1230544561 is about 35079.1185892690. The cubic root of 1230544561 is about 1071.5993669927.

Adding to 1230544561 its reverse (1654450321), we get a palindrome (2884994882).

The spelling of 1230544561 in words is "one billion, two hundred thirty million, five hundred forty-four thousand, five hundred sixty-one".