30745 has 16 divisors (see below), whose sum is σ = 44352. Its totient is φ = 20160.

The previous prime is 30727. The next prime is 30757. The reversal of 30745 is 54703.

30745 = 13² + 14² + ... + 45².

30745 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 30745 - 2⁵ = 30713 is a prime.

It is an alternating number because its digits alternate between odd and even.

30745 is strictly pandigital in base 6.

It is a nialpdrome in base 11.

It is a congruent 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 in 15 ways as a sum of consecutive naturals, for example, 694 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (2772).

2³⁰⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

30745 is a deficient number, since it is larger than the sum of its proper divisors (13607).

30745 is a wasteful number, since it uses less digits than its factorization.

30745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 30745 is about 175.3425219392. The cubic root of 30745 is about 31.3274346323.

The spelling of 30745 in words is "thirty thousand, seven hundred forty-five".