1289077172 has 6 divisors (see below), whose sum is σ = 2255885058. Its totient is φ = 644538584.

The previous prime is 1289077129. The next prime is 1289077189. The reversal of 1289077172 is 2717709821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1119973156 + 169104016 = 33466^2 + 13004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161134643 + ... + 161134650.

It is an arithmetic number, because the mean of its divisors is an integer number (375980843).

Almost surely, 2^1289077172 is an apocalyptic number.

It is an amenable number.

1289077172 is a deficient number, since it is larger than the sum of its proper divisors (966807886).

1289077172 is a wasteful number, since it uses less digits than its factorization.

1289077172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322269297 (or 322269295 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 44.

The square root of 1289077172 is about 35903.7208656707. The cubic root of 1289077172 is about 1088.3275904495.

The spelling of 1289077172 in words is "one billion, two hundred eighty-nine million, seventy-seven thousand, one hundred seventy-two".