717120 has 112 divisors (see below), whose sum is σ = 2560320. Its totient is φ = 188928.

The previous prime is 717113. The next prime is 717127. The reversal of 717120 is 21717.

It is an interprime number because it is at equal distance from previous prime (717113) and next prime (717127).

It is a super-2 number, since 2×717120² = 1028522188800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 717093 and 717102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717127) by changing a digit.

717120 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8599 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (22860).

2⁷¹⁷¹²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 717120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280160).

717120 is an abundant number, since it is smaller than the sum of its proper divisors (1843200).

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

717120 is a wasteful number, since it uses less digits than its factorization.

717120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 717120 is about 846.8293806901. The cubic root of 717120 is about 89.5084311107.

Adding to 717120 its reverse (21717), we get a palindrome (738837).

The spelling of 717120 in words is "seven hundred seventeen thousand, one hundred twenty", and thus it is an iban number.