720481 has 2 divisors, whose sum is σ = 720482. Its totient is φ = 720480.

The previous prime is 720439. The next prime is 720491. The reversal of 720481 is 184027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576081 + 144400 = 759^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 720481 - 2¹¹ = 718433 is a prime.

It is a super-2 number, since 2×720481² = 1038185742722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (720491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360240 + 360241.

It is an arithmetic number, because the mean of its divisors is an integer number (360241).

2⁷²⁰⁴⁸¹ is an apocalyptic number.

It is an amenable number.

720481 is a deficient number, since it is larger than the sum of its proper divisors (1).

720481 is an equidigital number, since it uses as much as digits as its factorization.

720481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 720481 is about 848.8115220707. The cubic root of 720481 is about 89.6480493372.

The spelling of 720481 in words is "seven hundred twenty thousand, four hundred eighty-one".