1224555020 has 24 divisors (see below), whose sum is σ = 2769378864. Its totient is φ = 452143296.

The previous prime is 1224555011. The next prime is 1224555023. The reversal of 1224555020 is 205554221.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1224555023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2354654 + ... + 2355173.

It is an arithmetic number, because the mean of its divisors is an integer number (115390786).

Almost surely, 2^1224555020 is an apocalyptic number.

1224555020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224555020 is an abundant number, since it is smaller than the sum of its proper divisors (1544823844).

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

1224555020 is a wasteful number, since it uses less digits than its factorization.

1224555020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709849 (or 4709847 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1224555020 is about 34993.6425654718. The cubic root of 1224555020 is about 1069.8579075879.

The spelling of 1224555020 in words is "one billion, two hundred twenty-four million, five hundred fifty-five thousand, twenty".