1245917047 has 2 divisors, whose sum is σ = 1245917048. Its totient is φ = 1245917046.

The previous prime is 1245917041. The next prime is 1245917081. The reversal of 1245917047 is 7407195421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245917047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245917041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622958523 + 622958524.

It is an arithmetic number, because the mean of its divisors is an integer number (622958524).

Almost surely, 2^1245917047 is an apocalyptic number.

1245917047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245917047 is an equidigital number, since it uses as much as digits as its factorization.

1245917047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 1245917047 is about 35297.5501557828. The cubic root of 1245917047 is about 1076.0432049534.

The spelling of 1245917047 in words is "one billion, two hundred forty-five million, nine hundred seventeen thousand, forty-seven".