1273065228 has 48 divisors (see below), whose sum is σ = 3303336960. Its totient is φ = 423995472.

The previous prime is 1273065221. The next prime is 1273065289. The reversal of 1273065228 is 8225603721.

1273065228 is a `hidden beast` number, since 127 + 3 + 0 + 6 + 522 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1273065192 and 1273065201.

It is not an unprimeable number, because it can be changed into a prime (1273065221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143325 + ... + 151947.

It is an arithmetic number, because the mean of its divisors is an integer number (68819520).

Almost surely, 2^1273065228 is an apocalyptic number.

1273065228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1273065228 is an abundant number, since it is smaller than the sum of its proper divisors (2030271732).

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

1273065228 is a wasteful number, since it uses less digits than its factorization.

1273065228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003 (or 9995 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1273065228 is about 35680.0396300228. The cubic root of 1273065228 is about 1083.8026753291.

Adding to 1273065228 its reverse (8225603721), we get a palindrome (9498668949).

The spelling of 1273065228 in words is "one billion, two hundred seventy-three million, sixty-five thousand, two hundred twenty-eight".