1245709897 has 2 divisors, whose sum is σ = 1245709898. Its totient is φ = 1245709896.

The previous prime is 1245709873. The next prime is 1245709973. The reversal of 1245709897 is 7989075421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631215376 + 614494521 = 25124^2 + 24789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245709897 - 2⁷ = 1245709769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245709807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622854948 + 622854949.

It is an arithmetic number, because the mean of its divisors is an integer number (622854949).

Almost surely, 2^1245709897 is an apocalyptic number.

It is an amenable number.

1245709897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245709897 is an equidigital number, since it uses as much as digits as its factorization.

1245709897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1245709897 is about 35294.6156941820. The cubic root of 1245709897 is about 1075.9835662305.

The spelling of 1245709897 in words is "one billion, two hundred forty-five million, seven hundred nine thousand, eight hundred ninety-seven".