1289057234 has 4 divisors (see below), whose sum is σ = 1933585854. Its totient is φ = 644528616.

The previous prime is 1289057191. The next prime is 1289057251. The reversal of 1289057234 is 4327509821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4327509821 = 31 ⋅139597091.

It can be written as a sum of positive squares in only one way, i.e., 1191975625 + 97081609 = 34525^2 + 9853^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1289057191 and 1289057200.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 322264307 + ... + 322264310.

Almost surely, 2^1289057234 is an apocalyptic number.

1289057234 is a deficient number, since it is larger than the sum of its proper divisors (644528620).

1289057234 is an equidigital number, since it uses as much as digits as its factorization.

1289057234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644528619.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1289057234 is about 35903.4432053529. The cubic root of 1289057234 is about 1088.3219794103.

The spelling of 1289057234 in words is "one billion, two hundred eighty-nine million, fifty-seven thousand, two hundred thirty-four".