1228572641 has 2 divisors, whose sum is σ = 1228572642. Its totient is φ = 1228572640.

The previous prime is 1228572593. The next prime is 1228572647. The reversal of 1228572641 is 1462758221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206520225 + 22052416 = 34735^2 + 4696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228572641 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1228572595 and 1228572604.

It is not a weakly prime, because it can be changed into another prime (1228572647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614286320 + 614286321.

It is an arithmetic number, because the mean of its divisors is an integer number (614286321).

Almost surely, 2^1228572641 is an apocalyptic number.

It is an amenable number.

1228572641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228572641 is an equidigital number, since it uses as much as digits as its factorization.

1228572641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 1228572641 is about 35051.0005705971. Note that the first 3 decimals coincide. The cubic root of 1228572641 is about 1071.0266563319.

The spelling of 1228572641 in words is "one billion, two hundred twenty-eight million, five hundred seventy-two thousand, six hundred forty-one".