1222472500 has 60 divisors (see below), whose sum is σ = 2685718420. Its totient is φ = 486720000.

The previous prime is 1222472497. The next prime is 1222472549. The reversal of 1222472500 is 52742221.

It can be written as a sum of positive squares in 10 ways, for example, as 377058724 + 845413776 = 19418^2 + 29076^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 601486 + ... + 603514.

Almost surely, 2^1222472500 is an apocalyptic number.

1222472500 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 1222472500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342859210).

1222472500 is an abundant number, since it is smaller than the sum of its proper divisors (1463245920).

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

1222472500 is a wasteful number, since it uses less digits than its factorization.

1222472500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294 (or 2277 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 1222472500 is about 34963.8742132505. The cubic root of 1222472500 is about 1069.2510845236.

The spelling of 1222472500 in words is "one billion, two hundred twenty-two million, four hundred seventy-two thousand, five hundred".