1245075109 has 2 divisors, whose sum is σ = 1245075110. Its totient is φ = 1245075108.

The previous prime is 1245075101. The next prime is 1245075113. The reversal of 1245075109 is 9015705421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 997170084 + 247905025 = 31578^2 + 15745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245075109 - 2³ = 1245075101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245075101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622537554 + 622537555.

It is an arithmetic number, because the mean of its divisors is an integer number (622537555).

Almost surely, 2^1245075109 is an apocalyptic number.

It is an amenable number.

1245075109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245075109 is an equidigital number, since it uses as much as digits as its factorization.

1245075109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1245075109 is about 35285.6218451652. The cubic root of 1245075109 is about 1075.8007688530.

The spelling of 1245075109 in words is "one billion, two hundred forty-five million, seventy-five thousand, one hundred nine".