1268020965 has 16 divisors (see below), whose sum is σ = 2030421888. Its totient is φ = 675748416.

The previous prime is 1268020927. The next prime is 1268021011. The reversal of 1268020965 is 5690208621.

It is not a de Polignac number, because 1268020965 - 2¹³ = 1268012773 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 12894 + ... + 51983.

It is an arithmetic number, because the mean of its divisors is an integer number (126901368).

Almost surely, 2^1268020965 is an apocalyptic number.

1268020965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1268020965 is a deficient number, since it is larger than the sum of its proper divisors (762400923).

1268020965 is a wasteful number, since it uses less digits than its factorization.

1268020965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66188.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1268020965 is about 35609.2820062410. The cubic root of 1268020965 is about 1082.3693310514.

The spelling of 1268020965 in words is "one billion, two hundred sixty-eight million, twenty thousand, nine hundred sixty-five".