1000720 has 40 divisors (see below), whose sum is σ = 2660544. Its totient is φ = 342912.

The previous prime is 1000697. The next prime is 1000721. The reversal of 1000720 is 270001.

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

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1000697 and 1000706.

It is not an unprimeable number, because it can be changed into a prime (1000721) 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, 334 + ... + 1453.

2^1000720 is an apocalyptic number.

1000720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000720 is an abundant number, since it is smaller than the sum of its proper divisors (1659824).

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

1000720 is a wasteful number, since it uses less digits than its factorization.

1000720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 1000720 is about 1000.3599352233. The cubic root of 1000720 is about 100.0239942423.

Adding to 1000720 its reverse (270001), we get a palindrome (1270721).

The spelling of 1000720 in words is "one million, seven hundred twenty", and thus it is an aban number.