1289026 has 4 divisors (see below), whose sum is σ = 1933542. Its totient is φ = 644512.

The previous prime is 1289009. The next prime is 1289027. The reversal of 1289026 is 6209821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 81225 = 1099^2 + 285^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1288985 and 1289003.

It is not an unprimeable number, because it can be changed into a prime (1289027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322255 + ... + 322258.

2^1289026 is an apocalyptic number.

1289026 is a deficient number, since it is larger than the sum of its proper divisors (644516).

1289026 is an equidigital number, since it uses as much as digits as its factorization.

1289026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644515.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1289026 is about 1135.3528086018. The cubic root of 1289026 is about 108.8313189285.

The spelling of 1289026 in words is "one million, two hundred eighty-nine thousand, twenty-six".