45549921 has 8 divisors (see below), whose sum is σ = 60883360. Its totient is φ = 30291552.

The previous prime is 45549853. The next prime is 45549971. The reversal of 45549921 is 12994554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-45549921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45549921.

It is not an unprimeable number, because it can be changed into a prime (45549971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17335 + ... + 19788.

It is an arithmetic number, because the mean of its divisors is an integer number (7610420).

Almost surely, 2^45549921 is an apocalyptic number.

It is an amenable number.

45549921 is a deficient number, since it is larger than the sum of its proper divisors (15333439).

45549921 is a wasteful number, since it uses less digits than its factorization.

45549921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37535.

The product of its digits is 64800, while the sum is 39.

The square root of 45549921 is about 6749.0681579015. The cubic root of 45549921 is about 357.1323646670.

The spelling of 45549921 in words is "forty-five million, five hundred forty-nine thousand, nine hundred twenty-one".