72458 has 4 divisors (see below), whose sum is σ = 108690. Its totient is φ = 36228.

The previous prime is 72431. The next prime is 72461. The reversal of 72458 is 85427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61009 + 11449 = 247^2 + 107^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18113 + ... + 18116.

2⁷²⁴⁵⁸ is an apocalyptic number.

72458 is a deficient number, since it is larger than the sum of its proper divisors (36232).

72458 is a wasteful number, since it uses less digits than its factorization.

72458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36231.

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

The square root of 72458 is about 269.1802370160. The cubic root of 72458 is about 41.6897010415.

The spelling of 72458 in words is "seventy-two thousand, four hundred fifty-eight".