75745 has 4 divisors (see below), whose sum is σ = 90900. Its totient is φ = 60592.

The previous prime is 75743. The next prime is 75767. The reversal of 75745 is 54757.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54757 = 17 ⋅3221.

It can be written as a sum of positive squares in 2 ways, for example, as 40401 + 35344 = 201^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 75745 - 2¹ = 75743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7570 + ... + 7579.

It is an arithmetic number, because the mean of its divisors is an integer number (22725).

2⁷⁵⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

75745 is a deficient number, since it is larger than the sum of its proper divisors (15155).

75745 is a wasteful number, since it uses less digits than its factorization.

75745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15154.

The product of its digits is 4900, while the sum is 28.

The square root of 75745 is about 275.2180953353. The cubic root of 75745 is about 42.3108084164.

It can be divided in two parts, 75 and 745, that added together give a triangular number (820 = T₄₀).

The spelling of 75745 in words is "seventy-five thousand, seven hundred forty-five".