1225504200 has 96 divisors (see below), whose sum is σ = 3805560000. Its totient is φ = 326242560.

The previous prime is 1225504187. The next prime is 1225504229. The reversal of 1225504200 is 24055221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444426 + ... + 447174.

It is an arithmetic number, because the mean of its divisors is an integer number (39641250).

Almost surely, 2^1225504200 is an apocalyptic number.

1225504200 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 1225504200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1902780000).

1225504200 is an abundant number, since it is smaller than the sum of its proper divisors (2580055800).

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

1225504200 is a wasteful number, since it uses less digits than its factorization.

1225504200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1225504200 is about 35007.2021161360. The cubic root of 1225504200 is about 1070.1342598000.

Adding to 1225504200 its reverse (24055221), we get a palindrome (1249559421).

The spelling of 1225504200 in words is "one billion, two hundred twenty-five million, five hundred four thousand, two hundred".