1230406561 has 8 divisors (see below), whose sum is σ = 1259677440. Its totient is φ = 1201264608.

The previous prime is 1230406553. The next prime is 1230406613. The reversal of 1230406561 is 1656040321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1230406561 - 2³ = 1230406553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230406531) 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 in 7 ways as a sum of consecutive naturals, for example, 12781 + ... + 51226.

It is an arithmetic number, because the mean of its divisors is an integer number (157459680).

Almost surely, 2^1230406561 is an apocalyptic number.

It is an amenable number.

1230406561 is a deficient number, since it is larger than the sum of its proper divisors (29270879).

1230406561 is an equidigital number, since it uses as much as digits as its factorization.

1230406561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64463.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1230406561 is about 35077.1515519718. The cubic root of 1230406561 is about 1071.5593071564.

Adding to 1230406561 its reverse (1656040321), we get a palindrome (2886446882).

The spelling of 1230406561 in words is "one billion, two hundred thirty million, four hundred six thousand, five hundred sixty-one".