720975 has 12 divisors (see below), whose sum is σ = 1192136. Its totient is φ = 384480.

The previous prime is 720971. The next prime is 720983. The reversal of 720975 is 579027.

It is a happy number.

It is not a de Polignac number, because 720975 - 2² = 720971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720975.

It is not an unprimeable number, because it can be changed into a prime (720971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4732 + ... + 4881.

2⁷²⁰⁹⁷⁵ is an apocalyptic number.

720975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

720975 is a deficient number, since it is larger than the sum of its proper divisors (471161).

720975 is a wasteful number, since it uses less digits than its factorization.

720975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626 (or 9621 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 720975 is about 849.1024673148. The cubic root of 720975 is about 89.6685338092.

The spelling of 720975 in words is "seven hundred twenty thousand, nine hundred seventy-five".