1227125761 has 2 divisors, whose sum is σ = 1227125762. Its totient is φ = 1227125760.

The previous prime is 1227125747. The next prime is 1227125771. The reversal of 1227125761 is 1675217221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113490161 + 113635600 = 33369^2 + 10660^2 .

It is an emirp because it is prime and its reverse (1675217221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1227125761 - 2¹³ = 1227117569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1227125741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613562880 + 613562881.

It is an arithmetic number, because the mean of its divisors is an integer number (613562881).

Almost surely, 2^1227125761 is an apocalyptic number.

It is an amenable number.

1227125761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227125761 is an equidigital number, since it uses as much as digits as its factorization.

1227125761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 1227125761 is about 35030.3548511858. The cubic root of 1227125761 is about 1070.6060447130.

The spelling of 1227125761 in words is "one billion, two hundred twenty-seven million, one hundred twenty-five thousand, seven hundred sixty-one".