1296061189 has 4 divisors (see below), whose sum is σ = 1308893580. Its totient is φ = 1283228800.

The previous prime is 1296061187. The next prime is 1296061241. The reversal of 1296061189 is 9811606921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9811606921 = 32803 ⋅299107.

It can be written as a sum of positive squares in 2 ways, for example, as 611820225 + 684240964 = 24735^2 + 26158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296061189 - 2¹ = 1296061187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296061187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416044 + ... + 6416245.

It is an arithmetic number, because the mean of its divisors is an integer number (327223395).

Almost surely, 2^1296061189 is an apocalyptic number.

It is an amenable number.

1296061189 is a deficient number, since it is larger than the sum of its proper divisors (12832391).

1296061189 is a wasteful number, since it uses less digits than its factorization.

1296061189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832390.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1296061189 is about 36000.8498371913. The cubic root of 1296061189 is about 1090.2895140391.

The spelling of 1296061189 in words is "one billion, two hundred ninety-six million, sixty-one thousand, one hundred eighty-nine".