1289330 has 32 divisors (see below), whose sum is σ = 2692224. Its totient is φ = 435456.

The previous prime is 1289329. The next prime is 1289333. The reversal of 1289330 is 339821.

1289330 = T₉₁ + T₉₂ + ... + T₂₀₃.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1289330.

It is not an unprimeable number, because it can be changed into a prime (1289333) 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, 7829 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (84132).

2^1289330 is an apocalyptic number.

1289330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289330 is an abundant number, since it is smaller than the sum of its proper divisors (1402894).

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

1289330 is a wasteful number, since it uses less digits than its factorization.

1289330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1289330 is about 1135.4866797986. The cubic root of 1289330 is about 108.8398737393.

The spelling of 1289330 in words is "one million, two hundred eighty-nine thousand, three hundred thirty".