1239120 has 60 divisors (see below), whose sum is σ = 4163796. Its totient is φ = 330240.

The previous prime is 1239109. The next prime is 1239127. The reversal of 1239120 is 219321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 553536 = 828^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1239093 and 1239102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141 + ... + 1580.

2^1239120 is an apocalyptic number.

1239120 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 1239120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081898).

1239120 is an abundant number, since it is smaller than the sum of its proper divisors (2924676).

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

1239120 is a wasteful number, since it uses less digits than its factorization.

1239120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1239120 is about 1113.1576707727. The cubic root of 1239120 is about 107.4082866592.

It can be divided in two parts, 1 and 239120, that added together give a square (239121 = 489²).

The spelling of 1239120 in words is "one million, two hundred thirty-nine thousand, one hundred twenty".