1318720 has 56 divisors (see below), whose sum is σ = 3392424. Its totient is φ = 485376.

The previous prime is 1318711. The next prime is 1318721. The reversal of 1318720 is 278131.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 1290496 = 168^2 + 1136^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1318691 and 1318700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4002 + ... + 4318.

It is an arithmetic number, because the mean of its divisors is an integer number (60579).

2^1318720 is an apocalyptic number.

1318720 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 1318720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1696212).

1318720 is an abundant number, since it is smaller than the sum of its proper divisors (2073704).

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

1318720 is a wasteful number, since it uses less digits than its factorization.

1318720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1318720 is about 1148.3553457010. The cubic root of 1318720 is about 109.6606622462.

The spelling of 1318720 in words is "one million, three hundred eighteen thousand, seven hundred twenty".