1234454561 has 2 divisors, whose sum is σ = 1234454562. Its totient is φ = 1234454560.

The previous prime is 1234454537. The next prime is 1234454563. The reversal of 1234454561 is 1654544321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777350161 + 457104400 = 27881^2 + 21380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234454561 - 2¹⁰ = 1234453537 is a prime.

Together with 1234454563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1234454563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617227280 + 617227281.

It is an arithmetic number, because the mean of its divisors is an integer number (617227281).

Almost surely, 2^1234454561 is an apocalyptic number.

It is an amenable number.

1234454561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234454561 is an equidigital number, since it uses as much as digits as its factorization.

1234454561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 35.

The square root of 1234454561 is about 35134.8055494833. The cubic root of 1234454561 is about 1072.7331532525.

Adding to 1234454561 its reverse (1654544321), we get a palindrome (2888998882).

The spelling of 1234454561 in words is "one billion, two hundred thirty-four million, four hundred fifty-four thousand, five hundred sixty-one".