1225199800 has 96 divisors (see below), whose sum is σ = 3271219200. Its totient is φ = 422064000.

The previous prime is 1225199797. The next prime is 1225199863. The reversal of 1225199800 is 89915221.

It is a super-2 number, since 2×1225199800² = 3002229099840080000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225199800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27145 + ... + 56455.

It is an arithmetic number, because the mean of its divisors is an integer number (34075200).

Almost surely, 2^1225199800 is an apocalyptic number.

1225199800 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 1225199800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1635609600).

1225199800 is an abundant number, since it is smaller than the sum of its proper divisors (2046019400).

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

1225199800 is a wasteful number, since it uses less digits than its factorization.

1225199800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29357 (or 29348 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 1225199800 is about 35002.8541693388. The cubic root of 1225199800 is about 1070.0456497833.

The spelling of 1225199800 in words is "one billion, two hundred twenty-five million, one hundred ninety-nine thousand, eight hundred".