1289442 has 32 divisors (see below), whose sum is σ = 3216384. Its totient is φ = 334800.

The previous prime is 1289429. The next prime is 1289447. The reversal of 1289442 is 2449821.

It is not an unprimeable number, because it can be changed into a prime (1289447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (100512).

2^1289442 is an apocalyptic number.

1289442 is an abundant number, since it is smaller than the sum of its proper divisors (1926942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289442 is a wasteful number, since it uses less digits than its factorization.

1289442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814.

The product of its digits is 4608, while the sum is 30.

The square root of 1289442 is about 1135.5359967874. The cubic root of 1289442 is about 108.8430251727.

The spelling of 1289442 in words is "one million, two hundred eighty-nine thousand, four hundred forty-two".