1289313 has 6 divisors (see below), whose sum is σ = 1862354. Its totient is φ = 859536.

The previous prime is 1289303. The next prime is 1289329. The reversal of 1289313 is 3139821.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 603729 = 828^2 + 777^2 .

It is not a de Polignac number, because 1289313 - 2¹⁶ = 1223777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71620 + ... + 71637.

2^1289313 is an apocalyptic number.

It is an amenable number.

1289313 is a deficient number, since it is larger than the sum of its proper divisors (573041).

1289313 is a wasteful number, since it uses less digits than its factorization.

1289313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143263 (or 143260 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1289313 is about 1135.4791939970. The cubic root of 1289313 is about 108.8393953807.

The spelling of 1289313 in words is "one million, two hundred eighty-nine thousand, three hundred thirteen".