1223225420 has 12 divisors (see below), whose sum is σ = 2568773424. Its totient is φ = 489290160.

The previous prime is 1223225407. The next prime is 1223225441. The reversal of 1223225420 is 245223221.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30580616 + ... + 30580655.

It is an arithmetic number, because the mean of its divisors is an integer number (214064452).

Almost surely, 2^1223225420 is an apocalyptic number.

1223225420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223225420 is an abundant number, since it is smaller than the sum of its proper divisors (1345548004).

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

1223225420 is a wasteful number, since it uses less digits than its factorization.

1223225420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61161280 (or 61161278 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1223225420 is about 34974.6396693376. The cubic root of 1223225420 is about 1069.4705564829.

Adding to 1223225420 its reverse (245223221), we get a palindrome (1468448641).

The spelling of 1223225420 in words is "one billion, two hundred twenty-three million, two hundred twenty-five thousand, four hundred twenty".