Search a number
BaseRepresentation
bin100100111001010101000
32021102102210
410213022220
5302142000
641525120
713163532
oct4471250
92242383
101209000
11756381
124a37a0
133343b0
14236852
1518d350
hex1272a8

1209000 has 128 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 288000.

The previous prime is 1208957. The next prime is 1209007. The reversal of 1209000 is 9021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1209007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38985 + ... + 39015.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

21209000 is an apocalyptic number.

1209000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096640).

1209000 is an abundant number, since it is smaller than the sum of its proper divisors (2984280).

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

1209000 is a wasteful number, since it uses less digits than its factorization.

1209000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1209000 is about 1099.5453605923. The cubic root of 1209000 is about 106.5308601525.

The spelling of 1209000 in words is "one million, two hundred nine thousand".