1305976965 has 16 divisors (see below), whose sum is σ = 2110254336. Its totient is φ = 689624000.

The previous prime is 1305976933. The next prime is 1305976967. The reversal of 1305976965 is 5696795031.

It is not a de Polignac number, because 1305976965 - 2⁵ = 1305976933 is a prime.

It is a super-2 number, since 2×1305976965² = 3411151666221222450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305976967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429501 + ... + 432530.

It is an arithmetic number, because the mean of its divisors is an integer number (131890896).

Almost surely, 2^1305976965 is an apocalyptic number.

1305976965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305976965 is a deficient number, since it is larger than the sum of its proper divisors (804277371).

1305976965 is a wasteful number, since it uses less digits than its factorization.

1305976965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862140.

The product of its (nonzero) digits is 1530900, while the sum is 51.

The square root of 1305976965 is about 36138.3032944271. The cubic root of 1305976965 is about 1093.0629459665.

The spelling of 1305976965 in words is "one billion, three hundred five million, nine hundred seventy-six thousand, nine hundred sixty-five".