45842 has 4 divisors (see below), whose sum is σ = 68766. Its totient is φ = 22920.

The previous prime is 45841. The next prime is 45853. The reversal of 45842 is 24854.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39601 + 6241 = 199^2 + 79^2 .

It is not an unprimeable number, because it can be changed into a prime (45841) by changing a digit.

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 as a sum of consecutive naturals, namely, 11459 + ... + 11462.

2⁴⁵⁸⁴² is an apocalyptic number.

45842 is a deficient number, since it is larger than the sum of its proper divisors (22924).

45842 is a wasteful number, since it uses less digits than its factorization.

45842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22923.

The product of its digits is 1280, while the sum is 23.

The square root of 45842 is about 214.1074496602. The cubic root of 45842 is about 35.7894083499.

The spelling of 45842 in words is "forty-five thousand, eight hundred forty-two".