1222761200 has 60 divisors (see below), whose sum is σ = 3017117160. Its totient is φ = 475879680.

The previous prime is 1222761173. The next prime is 1222761203. The reversal of 1222761200 is 21672221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222761203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26510 + ... + 56109.

It is an arithmetic number, because the mean of its divisors is an integer number (50285286).

Almost surely, 2^1222761200 is an apocalyptic number.

1222761200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222761200 is an abundant number, since it is smaller than the sum of its proper divisors (1794355960).

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

1222761200 is a wasteful number, since it uses less digits than its factorization.

1222761200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82674 (or 82663 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1222761200 is about 34968.0025165865. The cubic root of 1222761200 is about 1069.3352496046.

The spelling of 1222761200 in words is "one billion, two hundred twenty-two million, seven hundred sixty-one thousand, two hundred".