45047 has 4 divisors (see below), whose sum is σ = 45576. Its totient is φ = 44520.

The previous prime is 45013. The next prime is 45053. The reversal of 45047 is 74054.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45047 - 2⁶ = 44983 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104 + ... + 317.

It is an arithmetic number, because the mean of its divisors is an integer number (11394).

2⁴⁵⁰⁴⁷ is an apocalyptic number.

45047 is a deficient number, since it is larger than the sum of its proper divisors (529).

45047 is a wasteful number, since it uses less digits than its factorization.

45047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 45047 is about 212.2427855075. The cubic root of 45047 is about 35.5813119944.

The spelling of 45047 in words is "forty-five thousand, forty-seven".