45547 has 4 divisors (see below), whose sum is σ = 46816. Its totient is φ = 44280.

The previous prime is 45541. The next prime is 45553. The reversal of 45547 is 74554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74554 = 2 ⋅37277.

It is an interprime number because it is at equal distance from previous prime (45541) and next prime (45553).

It is a cyclic number.

It is not a de Polignac number, because 45547 - 2¹¹ = 43499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45541) 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, 579 + ... + 652.

It is an arithmetic number, because the mean of its divisors is an integer number (11704).

2⁴⁵⁵⁴⁷ is an apocalyptic number.

45547 is a deficient number, since it is larger than the sum of its proper divisors (1269).

45547 is a wasteful number, since it uses less digits than its factorization.

45547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268.

The product of its digits is 2800, while the sum is 25.

The square root of 45547 is about 213.4174313406. The cubic root of 45547 is about 35.7124730509.

It can be divided in two parts, 4554 and 7, that multiplied together give a triangular number (31878 = T₂₅₂).

The spelling of 45547 in words is "forty-five thousand, five hundred forty-seven".