1225707757 has 2 divisors, whose sum is σ = 1225707758. Its totient is φ = 1225707756.

The previous prime is 1225707737. The next prime is 1225707761. The reversal of 1225707757 is 7577075221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214592201 + 11115556 = 34851^2 + 3334^2 .

It is an emirp because it is prime and its reverse (7577075221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225707757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225707737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612853878 + 612853879.

It is an arithmetic number, because the mean of its divisors is an integer number (612853879).

Almost surely, 2^1225707757 is an apocalyptic number.

It is an amenable number.

1225707757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225707757 is an equidigital number, since it uses as much as digits as its factorization.

1225707757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240100, while the sum is 43.

The square root of 1225707757 is about 35010.1093542994. The cubic root of 1225707757 is about 1070.1935065057.

The spelling of 1225707757 in words is "one billion, two hundred twenty-five million, seven hundred seven thousand, seven hundred fifty-seven".