1200720 has 40 divisors (see below), whose sum is σ = 3722976. Its totient is φ = 320128.

The previous prime is 1200701. The next prime is 1200739. The reversal of 1200720 is 270021.

It is an interprime number because it is at equal distance from previous prime (1200701) and next prime (1200739).

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

It is a super-3 number, since 3×1200720³ = 5193336799839744000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1200696 and 1200705.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2262 + ... + 2741.

2^1200720 is an apocalyptic number.

1200720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200720 is an abundant number, since it is smaller than the sum of its proper divisors (2522256).

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

1200720 is a wasteful number, since it uses less digits than its factorization.

1200720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019 (or 5013 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 1200720 is about 1095.7736992646. The cubic root of 1200720 is about 106.2871058404.

Adding to 1200720 its reverse (270021), we get a palindrome (1470741).

The spelling of 1200720 in words is "one million, two hundred thousand, seven hundred twenty".