1225472736 has 48 divisors (see below), whose sum is σ = 3285321984. Its totient is φ = 399798144.

The previous prime is 1225472723. The next prime is 1225472741. The reversal of 1225472736 is 6372745221.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1225472694 and 1225472703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131290 + ... + 140313.

It is an arithmetic number, because the mean of its divisors is an integer number (68444208).

Almost surely, 2^1225472736 is an apocalyptic number.

1225472736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1225472736 is an abundant number, since it is smaller than the sum of its proper divisors (2059849248).

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

1225472736 is a wasteful number, since it uses less digits than its factorization.

1225472736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271663 (or 271655 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 1225472736 is about 35006.7527200110. The cubic root of 1225472736 is about 1070.1251013947.

The spelling of 1225472736 in words is "one billion, two hundred twenty-five million, four hundred seventy-two thousand, seven hundred thirty-six".