1220125600 has 36 divisors (see below), whose sum is σ = 2978633574. Its totient is φ = 488049920.

The previous prime is 1220125553. The next prime is 1220125637. The reversal of 1220125600 is 65210221.

It can be written as a sum of positive squares in 3 ways, for example, as 1180334736 + 39790864 = 34356^2 + 6308^2 .

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 5 ways as a sum of consecutive naturals, for example, 761779 + ... + 763378.

Almost surely, 2^1220125600 is an apocalyptic number.

1220125600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220125600 is an abundant number, since it is smaller than the sum of its proper divisors (1758507974).

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

1220125600 is a wasteful number, since it uses less digits than its factorization.

1220125600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525177 (or 1525164 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220125600 is about 34930.2963056428. The cubic root of 1220125600 is about 1068.5663975611.

Adding to 1220125600 its reverse (65210221), we get a palindrome (1285335821).

The spelling of 1220125600 in words is "one billion, two hundred twenty million, one hundred twenty-five thousand, six hundred".