1318240 has 96 divisors (see below), whose sum is σ = 3919104. Its totient is φ = 407040.

The previous prime is 1318211. The next prime is 1318241. The reversal of 1318240 is 428131.

1318240 = 127² + 128² + ... + 181².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318241) 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, 12267 + ... + 12373.

It is an arithmetic number, because the mean of its divisors is an integer number (40824).

2^1318240 is an apocalyptic number.

1318240 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 1318240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959552).

1318240 is an abundant number, since it is smaller than the sum of its proper divisors (2600864).

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

1318240 is a wasteful number, since it uses less digits than its factorization.

1318240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1318240 is about 1148.1463321372. The cubic root of 1318240 is about 109.6473555282.

The spelling of 1318240 in words is "one million, three hundred eighteen thousand, two hundred forty".