1209120 has 96 divisors (see below), whose sum is σ = 4173120. Its totient is φ = 291840.

The previous prime is 1209113. The next prime is 1209121. The reversal of 1209120 is 219021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1209120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209121) 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, 5166 + ... + 5394.

It is an arithmetic number, because the mean of its divisors is an integer number (43470).

2^1209120 is an apocalyptic number.

1209120 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 1209120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2086560).

1209120 is an abundant number, since it is smaller than the sum of its proper divisors (2964000).

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

1209120 is a wasteful number, since it uses less digits than its factorization.

1209120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1209120 is about 1099.5999272463. The cubic root of 1209120 is about 106.5343846301.

1209120 divided by its sum of digits (15) gives a palindrome (80608).

Subtracting from 1209120 its reverse (219021), we obtain a palindrome (990099).

The spelling of 1209120 in words is "one million, two hundred nine thousand, one hundred twenty".