1223456545 has 16 divisors (see below), whose sum is σ = 1477416960. Its totient is φ = 972604224.

The previous prime is 1223456501. The next prime is 1223456599. The reversal of 1223456545 is 5456543221.

It is a cyclic number.

It is not a de Polignac number, because 1223456545 - 2²¹ = 1221359393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1124992 + ... + 1126078.

It is an arithmetic number, because the mean of its divisors is an integer number (92338560).

Almost surely, 2^1223456545 is an apocalyptic number.

It is an amenable number.

1223456545 is a deficient number, since it is larger than the sum of its proper divisors (253960415).

1223456545 is a wasteful number, since it uses less digits than its factorization.

1223456545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304.

The product of its digits is 144000, while the sum is 37.

The square root of 1223456545 is about 34977.9436931332. The cubic root of 1223456545 is about 1069.5379100581.

Adding to 1223456545 its reverse (5456543221), we get a palindrome (6679999766).

The spelling of 1223456545 in words is "one billion, two hundred twenty-three million, four hundred fifty-six thousand, five hundred forty-five".