75445 has 8 divisors (see below), whose sum is σ = 92160. Its totient is φ = 59280.

The previous prime is 75437. The next prime is 75479. The reversal of 75445 is 54457.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75445 - 2³ = 75437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300 + ... + 490.

It is an arithmetic number, because the mean of its divisors is an integer number (11520).

2⁷⁵⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

75445 is a deficient number, since it is larger than the sum of its proper divisors (16715).

75445 is a wasteful number, since it uses less digits than its factorization.

75445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its digits is 2800, while the sum is 25.

The square root of 75445 is about 274.6725322998. The cubic root of 75445 is about 42.2548749671.

It can be divided in two parts, 754 and 45, that multiplied together give a triangular number (33930 = T₂₆₀).

The spelling of 75445 in words is "seventy-five thousand, four hundred forty-five".