1225258067728 has 20 divisors (see below), whose sum is σ = 2513580889500. Its totient is φ = 576592031744.

The previous prime is 1225258067717. The next prime is 1225258067783. The reversal of 1225258067728 is 8277608525221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 521994690064 + 703263377664 = 722492^2 + 838608^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252312353 + ... + 2252312896.

It is an arithmetic number, because the mean of its divisors is an integer number (125679044475).

Almost surely, 2^{1225258067728} is an apocalyptic number.

It is an amenable number.

1225258067728 is an abundant number, since it is smaller than the sum of its proper divisors (1288322821772).

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

1225258067728 is a wasteful number, since it uses less digits than its factorization.

1225258067728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504625274 (or 4504625268 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 1225258067728 in words is "one trillion, two hundred twenty-five billion, two hundred fifty-eight million, sixty-seven thousand, seven hundred twenty-eight".