1244128285 has 8 divisors (see below), whose sum is σ = 1493397720. Its totient is φ = 995006784.

The previous prime is 1244128283. The next prime is 1244128349. The reversal of 1244128285 is 5828214421.

It can be written as a sum of positive squares in 4 ways, for example, as 277788889 + 966339396 = 16667^2 + 31086^2 .

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 1244128285 - 2¹ = 1244128283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244128283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17550 + ... + 52879.

It is an arithmetic number, because the mean of its divisors is an integer number (186674715).

Almost surely, 2^1244128285 is an apocalyptic number.

It is an amenable number.

1244128285 is a deficient number, since it is larger than the sum of its proper divisors (249269435).

1244128285 is an equidigital number, since it uses as much as digits as its factorization.

1244128285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73967.

The product of its digits is 40960, while the sum is 37.

The square root of 1244128285 is about 35272.2027239581. The cubic root of 1244128285 is about 1075.5280002232.

The spelling of 1244128285 in words is "one billion, two hundred forty-four million, one hundred twenty-eight thousand, two hundred eighty-five".