1247982065 has 32 divisors (see below), whose sum is σ = 1682640000. Its totient is φ = 880588800.

The previous prime is 1247982059. The next prime is 1247982079. The reversal of 1247982065 is 5602897421.

It is a happy number.

It is not a de Polignac number, because 1247982065 - 2⁸ = 1247981809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 998561 + ... + 999809.

It is an arithmetic number, because the mean of its divisors is an integer number (52582500).

Almost surely, 2^1247982065 is an apocalyptic number.

It is an amenable number.

1247982065 is a deficient number, since it is larger than the sum of its proper divisors (434657935).

1247982065 is a wasteful number, since it uses less digits than its factorization.

1247982065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1247982065 is about 35326.7896220418. The cubic root of 1247982065 is about 1076.6373649185.

The spelling of 1247982065 in words is "one billion, two hundred forty-seven million, nine hundred eighty-two thousand, sixty-five".