1225525000 has 192 divisors, whose sum is σ = 3374784000. Its totient is φ = 408480000.

The previous prime is 1225524977. The next prime is 1225525009. The reversal of 1225525000 is 5255221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225525009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8224926 + ... + 8225074.

It is an arithmetic number, because the mean of its divisors is an integer number (17577000).

Almost surely, 2^1225525000 is an apocalyptic number.

1225525000 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 1225525000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687392000).

1225525000 is an abundant number, since it is smaller than the sum of its proper divisors (2149259000).

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

1225525000 is an equidigital number, since it uses as much as digits as its factorization.

1225525000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 1225525000 is about 35007.4991966007. The cubic root of 1225525000 is about 1070.1403140882.

The spelling of 1225525000 in words is "one billion, two hundred twenty-five million, five hundred twenty-five thousand".