305745 has 32 divisors (see below), whose sum is σ = 570240. Its totient is φ = 138240.

The previous prime is 305743. The next prime is 305749. The reversal of 305745 is 547503.

It is not a de Polignac number, because 305745 - 2¹ = 305743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2751 + ... + 2859.

It is an arithmetic number, because the mean of its divisors is an integer number (17820).

2³⁰⁵⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

305745 is a deficient number, since it is larger than the sum of its proper divisors (264495).

305745 is a wasteful number, since it uses less digits than its factorization.

305745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 305745 is about 552.9421307877. The cubic root of 305745 is about 67.3679172947.

It can be divided in two parts, 30 and 5745, that added together give a palindrome (5775).

The spelling of 305745 in words is "three hundred five thousand, seven hundred forty-five".