44547921 has 16 divisors (see below), whose sum is σ = 71997120. Its totient is φ = 26998560.

The previous prime is 44547911. The next prime is 44547949. The reversal of 44547921 is 12974544.

It is a happy number.

It is not a de Polignac number, because 44547921 - 2¹¹ = 44545873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44547911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74700 + ... + 75293.

It is an arithmetic number, because the mean of its divisors is an integer number (4499820).

Almost surely, 2^44547921 is an apocalyptic number.

It is an amenable number.

44547921 is a deficient number, since it is larger than the sum of its proper divisors (27449199).

44547921 is a wasteful number, since it uses less digits than its factorization.

44547921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150013 (or 150007 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 44547921 is about 6674.4228964009. The cubic root of 44547921 is about 354.4942106143.

The spelling of 44547921 in words is "forty-four million, five hundred forty-seven thousand, nine hundred twenty-one".