45278 has 4 divisors (see below), whose sum is σ = 67920. Its totient is φ = 22638.

The previous prime is 45263. The next prime is 45281. The reversal of 45278 is 87254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87254 = 2 ⋅43627.

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

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

45278 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11318 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (16980).

2⁴⁵²⁷⁸ is an apocalyptic number.

45278 is a deficient number, since it is larger than the sum of its proper divisors (22642).

45278 is a wasteful number, since it uses less digits than its factorization.

45278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22641.

The product of its digits is 2240, while the sum is 26.

The square root of 45278 is about 212.7862777531. The cubic root of 45278 is about 35.6420283834.

It can be divided in two parts, 45 and 278, that added together give a palindrome (323).

The spelling of 45278 in words is "forty-five thousand, two hundred seventy-eight".