720458 has 4 divisors (see below), whose sum is σ = 1080690. Its totient is φ = 360228.

The previous prime is 720439. The next prime is 720481. The reversal of 720458 is 854027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 854027 = 73 ⋅11699.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 26569 = 833^2 + 163^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720458.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180113 + ... + 180116.

2⁷²⁰⁴⁵⁸ is an apocalyptic number.

720458 is a deficient number, since it is larger than the sum of its proper divisors (360232).

720458 is a wasteful number, since it uses less digits than its factorization.

720458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360231.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 720458 is about 848.7979736074. The cubic root of 720458 is about 89.6470953786.

The spelling of 720458 in words is "seven hundred twenty thousand, four hundred fifty-eight".