45487 has 4 divisors (see below), whose sum is σ = 49000. Its totient is φ = 41976.

The previous prime is 45481. The next prime is 45491. The reversal of 45487 is 78454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78454 = 2 ⋅39227.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45481) 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, 1737 + ... + 1762.

It is an arithmetic number, because the mean of its divisors is an integer number (12250).

2⁴⁵⁴⁸⁷ is an apocalyptic number.

45487 is a deficient number, since it is larger than the sum of its proper divisors (3513).

45487 is a wasteful number, since it uses less digits than its factorization.

45487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512.

The product of its digits is 4480, while the sum is 28.

The square root of 45487 is about 213.2768154301. The cubic root of 45487 is about 35.6967845681.

The spelling of 45487 in words is "forty-five thousand, four hundred eighty-seven".