1289422 has 8 divisors (see below), whose sum is σ = 1943136. Its totient is φ = 641712.

The previous prime is 1289411. The next prime is 1289423. The reversal of 1289422 is 2249821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918 + ... + 1849.

It is an arithmetic number, because the mean of its divisors is an integer number (242892).

2^1289422 is an apocalyptic number.

1289422 is a deficient number, since it is larger than the sum of its proper divisors (653714).

1289422 is a wasteful number, since it uses less digits than its factorization.

1289422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002.

The product of its digits is 2304, while the sum is 28.

The square root of 1289422 is about 1135.5271903394. The cubic root of 1289422 is about 108.8424624301.

It can be divided in two parts, 1289 and 422, that added together give a triangular number (1711 = T₅₈).

The spelling of 1289422 in words is "one million, two hundred eighty-nine thousand, four hundred twenty-two".