1296989412 has 48 divisors (see below), whose sum is σ = 3181030272. Its totient is φ = 410502400.

The previous prime is 1296989363. The next prime is 1296989413. The reversal of 1296989412 is 2149896921.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1296989413) by changing a digit.

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, 20662 + ... + 54962.

It is an arithmetic number, because the mean of its divisors is an integer number (66271464).

Almost surely, 2^1296989412 is an apocalyptic number.

1296989412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296989412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1590515136).

1296989412 is an abundant number, since it is smaller than the sum of its proper divisors (1884040860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296989412 is a wasteful number, since it uses less digits than its factorization.

1296989412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34468 (or 34466 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 1296989412 is about 36013.7392115842. The cubic root of 1296989412 is about 1090.5497358832.

The spelling of 1296989412 in words is "one billion, two hundred ninety-six million, nine hundred eighty-nine thousand, four hundred twelve".