75605 has 4 divisors (see below), whose sum is σ = 90732. Its totient is φ = 60480.

The previous prime is 75583. The next prime is 75611. The reversal of 75605 is 50657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50657 = 179 ⋅283.

It can be written as a sum of positive squares in 2 ways, for example, as 21316 + 54289 = 146^2 + 233^2 .

It is not a de Polignac number, because 75605 - 2⁶ = 75541 is a prime.

It is a super-2 number, since 2×75605² = 11432232050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 75605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7556 + ... + 7565.

It is an arithmetic number, because the mean of its divisors is an integer number (22683).

2⁷⁵⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

75605 is a deficient number, since it is larger than the sum of its proper divisors (15127).

75605 is a wasteful number, since it uses less digits than its factorization.

75605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15126.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 75605 is about 274.9636339591. The cubic root of 75605 is about 42.2847245542.

The spelling of 75605 in words is "seventy-five thousand, six hundred five".