1289530 has 32 divisors (see below), whose sum is σ = 2669760. Its totient is φ = 443520.

The previous prime is 1289513. The next prime is 1289531. The reversal of 1289530 is 359821.

It is not an unprimeable number, because it can be changed into a prime (1289531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1782 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (83430).

2^1289530 is an apocalyptic number.

1289530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289530 is an abundant number, since it is smaller than the sum of its proper divisors (1380230).

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

1289530 is a wasteful number, since it uses less digits than its factorization.

1289530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1289530 is about 1135.5747443475. The cubic root of 1289530 is about 108.8455011709.

The spelling of 1289530 in words is "one million, two hundred eighty-nine thousand, five hundred thirty".