1296690043 has 8 divisors (see below), whose sum is σ = 1415303280. Its totient is φ = 1178198880.

The previous prime is 1296690013. The next prime is 1296690047. The reversal of 1296690043 is 3400966921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1296690043 - 2¹⁷ = 1296558971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1296689978 and 1296690005.

It is not an unprimeable number, because it can be changed into a prime (1296690047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7548 + ... + 51481.

It is an arithmetic number, because the mean of its divisors is an integer number (176912910).

Almost surely, 2^1296690043 is an apocalyptic number.

1296690043 is a deficient number, since it is larger than the sum of its proper divisors (118613237).

1296690043 is a wasteful number, since it uses less digits than its factorization.

1296690043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61037.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 1296690043 is about 36009.5826551767. The cubic root of 1296690043 is about 1090.4658231175.

The spelling of 1296690043 in words is "one billion, two hundred ninety-six million, six hundred ninety thousand, forty-three".