1289670 has 16 divisors (see below), whose sum is σ = 3095280. Its totient is φ = 343904.

The previous prime is 1289657. The next prime is 1289677. The reversal of 1289670 is 769821.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21465 + ... + 21524.

It is an arithmetic number, because the mean of its divisors is an integer number (193455).

2^1289670 is an apocalyptic number.

1289670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1289670 is an abundant number, since it is smaller than the sum of its proper divisors (1805610).

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

1289670 is a wasteful number, since it uses less digits than its factorization.

1289670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42999.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1289670 is about 1135.6363854685. The cubic root of 1289670 is about 108.8494400269.

The spelling of 1289670 in words is "one million, two hundred eighty-nine thousand, six hundred seventy".