45443421 has 24 divisors (see below), whose sum is σ = 69407520. Its totient is φ = 28571616.

The previous prime is 45443417. The next prime is 45443443. The reversal of 45443421 is 12434454.

It is a happy number.

It is not a de Polignac number, because 45443421 - 2² = 45443417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45443471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49650 + ... + 50556.

It is an arithmetic number, because the mean of its divisors is an integer number (2891980).

Almost surely, 2^45443421 is an apocalyptic number.

It is an amenable number.

45443421 is a deficient number, since it is larger than the sum of its proper divisors (23964099).

45443421 is a wasteful number, since it uses less digits than its factorization.

45443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1222 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 45443421 is about 6741.1735625186. The cubic root of 45443421 is about 356.8538111050.

Adding to 45443421 its reverse (12434454), we get a palindrome (57877875).

The spelling of 45443421 in words is "forty-five million, four hundred forty-three thousand, four hundred twenty-one".