1225650720 has 432 divisors, whose sum is σ = 4751841024. Its totient is φ = 264499200.

The previous prime is 1225650667. The next prime is 1225650737. The reversal of 1225650720 is 270565221.

1225650720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29893900 + ... + 29893940.

It is an arithmetic number, because the mean of its divisors is an integer number (10999632).

Almost surely, 2^1225650720 is an apocalyptic number.

1225650720 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 1225650720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2375920512).

1225650720 is an abundant number, since it is smaller than the sum of its proper divisors (3526190304).

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

1225650720 is a wasteful number, since it uses less digits than its factorization.

1225650720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 1225650720 is about 35009.2947658190. The cubic root of 1225650720 is about 1070.1769061446.

The spelling of 1225650720 in words is "one billion, two hundred twenty-five million, six hundred fifty thousand, seven hundred twenty".