1296165730 has 32 divisors (see below), whose sum is σ = 2418258240. Its totient is φ = 499611840.

The previous prime is 1296165659. The next prime is 1296165733. The reversal of 1296165730 is 375616921.

It is not an unprimeable number, because it can be changed into a prime (1296165733) 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, 154545 + ... + 162715.

It is an arithmetic number, because the mean of its divisors is an integer number (75570570).

Almost surely, 2^1296165730 is an apocalyptic number.

1296165730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1296165730 is a deficient number, since it is larger than the sum of its proper divisors (1122092510).

1296165730 is a wasteful number, since it uses less digits than its factorization.

1296165730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8754.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1296165730 is about 36002.3017319726. The cubic root of 1296165730 is about 1090.3188276993.

The spelling of 1296165730 in words is "one billion, two hundred ninety-six million, one hundred sixty-five thousand, seven hundred thirty".