1223425545 has 16 divisors (see below), whose sum is σ = 2042589312. Its totient is φ = 624124160.

The previous prime is 1223425537. The next prime is 1223425549. The reversal of 1223425545 is 5455243221.

It is a happy number.

It is not a de Polignac number, because 1223425545 - 2³ = 1223425537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223425549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1772736 + ... + 1773425.

It is an arithmetic number, because the mean of its divisors is an integer number (127661832).

Almost surely, 2^1223425545 is an apocalyptic number.

1223425545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223425545 is a deficient number, since it is larger than the sum of its proper divisors (819163767).

1223425545 is a wasteful number, since it uses less digits than its factorization.

1223425545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546192.

The product of its digits is 48000, while the sum is 33.

The square root of 1223425545 is about 34977.5005539275. The cubic root of 1223425545 is about 1069.5288766477.

Adding to 1223425545 its reverse (5455243221), we get a palindrome (6678668766).

The spelling of 1223425545 in words is "one billion, two hundred twenty-three million, four hundred twenty-five thousand, five hundred forty-five".