1289597 has 2 divisors, whose sum is σ = 1289598. Its totient is φ = 1289596.

The previous prime is 1289593. The next prime is 1289599. The reversal of 1289597 is 7959821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 81796 = 1099^2 + 286^2 .

It is an emirp because it is prime and its reverse (7959821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1289597 - 2² = 1289593 is a prime.

Together with 1289599, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1289593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644798 + 644799.

It is an arithmetic number, because the mean of its divisors is an integer number (644799).

2^1289597 is an apocalyptic number.

It is an amenable number.

1289597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289597 is an equidigital number, since it uses as much as digits as its factorization.

1289597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 1289597 is about 1135.6042444443. The cubic root of 1289597 is about 108.8473862304.

The spelling of 1289597 in words is "one million, two hundred eighty-nine thousand, five hundred ninety-seven".