1222240420 has 24 divisors (see below), whose sum is σ = 2615135544. Its totient is φ = 479671296.

The previous prime is 1222240403. The next prime is 1222240421. The reversal of 1222240420 is 240422221.

It can be written as a sum of positive squares in 4 ways, for example, as 148498596 + 1073741824 = 12186^2 + 32768^2 .

It is not an unprimeable number, because it can be changed into a prime (1222240421) 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, 575469 + ... + 577588.

It is an arithmetic number, because the mean of its divisors is an integer number (108963981).

Almost surely, 2^1222240420 is an apocalyptic number.

1222240420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222240420 is an abundant number, since it is smaller than the sum of its proper divisors (1392895124).

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

1222240420 is a wasteful number, since it uses less digits than its factorization.

1222240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153119 (or 1153117 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1222240420 is about 34960.5552015411. Note that the first 3 decimals coincide. The cubic root of 1222240420 is about 1069.1834163356.

Adding to 1222240420 its reverse (240422221), we get a palindrome (1462662641).

The spelling of 1222240420 in words is "one billion, two hundred twenty-two million, two hundred forty thousand, four hundred twenty".