1222421760 has 576 divisors, whose sum is σ = 5148917760. Its totient is φ = 268738560.

The previous prime is 1222421749. The next prime is 1222421773. The reversal of 1222421760 is 671242221.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7499439 + ... + 7499601.

Almost surely, 2^1222421760 is an apocalyptic number.

1222421760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222421760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2574458880).

1222421760 is an abundant number, since it is smaller than the sum of its proper divisors (3926496000).

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

1222421760 is a wasteful number, since it uses less digits than its factorization.

1222421760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1222421760 is about 34963.1485996327. The cubic root of 1222421760 is about 1069.2362908573.

Adding to 1222421760 its reverse (671242221), we get a palindrome (1893663981).

The spelling of 1222421760 in words is "one billion, two hundred twenty-two million, four hundred twenty-one thousand, seven hundred sixty".