1147240 has 64 divisors (see below), whose sum is σ = 2851200. Its totient is φ = 413952.

The previous prime is 1147231. The next prime is 1147243. The reversal of 1147240 is 427411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26659 + ... + 26701.

It is an arithmetic number, because the mean of its divisors is an integer number (44550).

2^1147240 is an apocalyptic number.

1147240 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 1147240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425600).

1147240 is an abundant number, since it is smaller than the sum of its proper divisors (1703960).

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

1147240 is a wasteful number, since it uses less digits than its factorization.

1147240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 1147240 is about 1071.0928997991. The cubic root of 1147240 is about 104.6850730112.

The spelling of 1147240 in words is "one million, one hundred forty-seven thousand, two hundred forty".