720425 has 6 divisors (see below), whose sum is σ = 893358. Its totient is φ = 576320.

The previous prime is 720413. The next prime is 720439. The reversal of 720425 is 524027.

It can be written as a sum of positive squares in 3 ways, for example, as 196249 + 524176 = 443^2 + 724^2 .

It is not a de Polignac number, because 720425 - 2⁶ = 720361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 720397 and 720406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14384 + ... + 14433.

It is an arithmetic number, because the mean of its divisors is an integer number (148893).

2⁷²⁰⁴²⁵ is an apocalyptic number.

It is an amenable number.

720425 is a deficient number, since it is larger than the sum of its proper divisors (172933).

720425 is a wasteful number, since it uses less digits than its factorization.

720425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28827 (or 28822 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 720425 is about 848.7785341301. The cubic root of 720425 is about 89.6457266200.

The spelling of 720425 in words is "seven hundred twenty thousand, four hundred twenty-five".