1236240 has 120 divisors (see below), whose sum is σ = 4439448. Its totient is φ = 307200.

The previous prime is 1236239. The next prime is 1236259. The reversal of 1236240 is 426321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 589824 + 646416 = 768^2 + 804^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12190 + ... + 12290.

2^1236240 is an apocalyptic number.

1236240 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 1236240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2219724).

1236240 is an abundant number, since it is smaller than the sum of its proper divisors (3203208).

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

1236240 is a wasteful number, since it uses less digits than its factorization.

1236240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1236240 is about 1111.8633009503. The cubic root of 1236240 is about 107.3250082488.

The spelling of 1236240 in words is "one million, two hundred thirty-six thousand, two hundred forty".