45749 has 4 divisors (see below), whose sum is σ = 49920. Its totient is φ = 41580.

The previous prime is 45737. The next prime is 45751. The reversal of 45749 is 94754.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-45749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45779) 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, 2069 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (12480).

2⁴⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

45749 is a deficient number, since it is larger than the sum of its proper divisors (4171).

45749 is a wasteful number, since it uses less digits than its factorization.

45749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170.

The product of its digits is 5040, while the sum is 29.

The square root of 45749 is about 213.8901587264. The cubic root of 45749 is about 35.7651898871.

The spelling of 45749 in words is "forty-five thousand, seven hundred forty-nine".