1275224785 has 8 divisors (see below), whose sum is σ = 1559143080. Its totient is φ = 1000930944.

The previous prime is 1275224777. The next prime is 1275224837. The reversal of 1275224785 is 5874225721.

It can be written as a sum of positive squares in 4 ways, for example, as 90763729 + 1184461056 = 9527^2 + 34416^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1275224785 - 2³ = 1275224777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2405820 + ... + 2406349.

It is an arithmetic number, because the mean of its divisors is an integer number (194892885).

Almost surely, 2^1275224785 is an apocalyptic number.

It is an amenable number.

1275224785 is a deficient number, since it is larger than the sum of its proper divisors (283918295).

1275224785 is an equidigital number, since it uses as much as digits as its factorization.

1275224785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812227.

The product of its digits is 313600, while the sum is 43.

The square root of 1275224785 is about 35710.2896235805. The cubic root of 1275224785 is about 1084.4151633091.

The spelling of 1275224785 in words is "one billion, two hundred seventy-five million, two hundred twenty-four thousand, seven hundred eighty-five".