1208720 has 40 divisors (see below), whose sum is σ = 2912760. Its totient is φ = 465920.

The previous prime is 1208707. The next prime is 1208731. The reversal of 1208720 is 278021.

It can be written as a sum of positive squares in 4 ways, for example, as 59536 + 1149184 = 244^2 + 1072^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1208720² = 2922008076800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1208692 and 1208701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060 + ... + 2580.

It is an arithmetic number, because the mean of its divisors is an integer number (72819).

2^1208720 is an apocalyptic number.

1208720 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 1208720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456380).

1208720 is an abundant number, since it is smaller than the sum of its proper divisors (1704040).

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

1208720 is a wasteful number, since it uses less digits than its factorization.

1208720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1208720 is about 1099.4180278675. The cubic root of 1208720 is about 106.5226354644.

The spelling of 1208720 in words is "one million, two hundred eight thousand, seven hundred twenty".