1223254520 has 32 divisors (see below), whose sum is σ = 2753399520. Its totient is φ = 489110400.

The previous prime is 1223254519. The next prime is 1223254547. The reversal of 1223254520 is 254523221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223254520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143909 + ... + 152171.

It is an arithmetic number, because the mean of its divisors is an integer number (86043735).

Almost surely, 2^1223254520 is an apocalyptic number.

1223254520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223254520 is an abundant number, since it is smaller than the sum of its proper divisors (1530145000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223254520 is a wasteful number, since it uses less digits than its factorization.

1223254520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11975 (or 11971 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1223254520 is about 34975.0556825861. The cubic root of 1223254520 is about 1069.4790371619.

Adding to 1223254520 its reverse (254523221), we get a palindrome (1477777741).

The spelling of 1223254520 in words is "one billion, two hundred twenty-three million, two hundred fifty-four thousand, five hundred twenty".