1223120 has 20 divisors (see below), whose sum is σ = 2843940. Its totient is φ = 489216.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223120 is 213221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 602176 + 620944 = 776^2 + 788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7565 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (142197).

2^1223120 is an apocalyptic number.

1223120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223120 is an abundant number, since it is smaller than the sum of its proper divisors (1620820).

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

1223120 is a wasteful number, since it uses less digits than its factorization.

1223120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15302 (or 15296 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1223120 is about 1105.9475575270. The cubic root of 1223120 is about 106.9439832567.

Adding to 1223120 its reverse (213221), we get a palindrome (1436341).

It can be divided in two parts, 12 and 23120, that added together give a palindrome (23132).

The spelling of 1223120 in words is "one million, two hundred twenty-three thousand, one hundred twenty".