1296705851 has 16 divisors (see below), whose sum is σ = 1532264448. Its totient is φ = 1073844000.

The previous prime is 1296705827. The next prime is 1296705857. The reversal of 1296705851 is 1585076921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1296705851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296705857) 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, 137126 + ... + 146276.

It is an arithmetic number, because the mean of its divisors is an integer number (95766528).

Almost surely, 2^1296705851 is an apocalyptic number.

1296705851 is a deficient number, since it is larger than the sum of its proper divisors (235558597).

1296705851 is an equidigital number, since it uses as much as digits as its factorization.

1296705851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9842.

The product of its (nonzero) digits is 151200, while the sum is 44.

The square root of 1296705851 is about 36009.8021516364. The cubic root of 1296705851 is about 1090.4702544036.

The spelling of 1296705851 in words is "one billion, two hundred ninety-six million, seven hundred five thousand, eight hundred fifty-one".