1228491125 has 8 divisors (see below), whose sum is σ = 1533157080. Its totient is φ = 982792800.

The previous prime is 1228491109. The next prime is 1228491161. The reversal of 1228491125 is 5211948221.

It can be written as a sum of positive squares in 4 ways, for example, as 198916 + 1228292209 = 446^2 + 35047^2 .

It is not a de Polignac number, because 1228491125 - 2⁴ = 1228491109 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4913840 + ... + 4914089.

It is an arithmetic number, because the mean of its divisors is an integer number (191644635).

Almost surely, 2^1228491125 is an apocalyptic number.

It is an amenable number.

1228491125 is a deficient number, since it is larger than the sum of its proper divisors (304665955).

1228491125 is an frugal number, since it uses more digits than its factorization.

1228491125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9827944 (or 9827934 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 1228491125 is about 35049.8377314361. The cubic root of 1228491125 is about 1071.0029682088.

The spelling of 1228491125 in words is "one billion, two hundred twenty-eight million, four hundred ninety-one thousand, one hundred twenty-five".