1228501273 has 2 divisors, whose sum is σ = 1228501274. Its totient is φ = 1228501272.

The previous prime is 1228501247. The next prime is 1228501303. The reversal of 1228501273 is 3721058221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1098723609 + 129777664 = 33147^2 + 11392^2 .

It is an emirp because it is prime and its reverse (3721058221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228501273 - 2⁹ = 1228500761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228501223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614250636 + 614250637.

It is an arithmetic number, because the mean of its divisors is an integer number (614250637).

Almost surely, 2^1228501273 is an apocalyptic number.

It is an amenable number.

1228501273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228501273 is an equidigital number, since it uses as much as digits as its factorization.

1228501273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1228501273 is about 35049.9824964293. The cubic root of 1228501273 is about 1071.0059172216.

Adding to 1228501273 its reverse (3721058221), we get a palindrome (4949559494).

The spelling of 1228501273 in words is "one billion, two hundred twenty-eight million, five hundred one thousand, two hundred seventy-three".