1239240 has 64 divisors (see below), whose sum is σ = 3888000. Its totient is φ = 315392.

The previous prime is 1239239. The next prime is 1239247. The reversal of 1239240 is 429321.

It is not an unprimeable number, because it can be changed into a prime (1239247) 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, 2536 + ... + 2984.

It is an arithmetic number, because the mean of its divisors is an integer number (60750).

2^1239240 is an apocalyptic number.

1239240 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 1239240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944000).

1239240 is an abundant number, since it is smaller than the sum of its proper divisors (2648760).

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

1239240 is a wasteful number, since it uses less digits than its factorization.

1239240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1239240 is about 1113.2115701878. The cubic root of 1239240 is about 107.4117537913.

The spelling of 1239240 in words is "one million, two hundred thirty-nine thousand, two hundred forty".