45044421 has 16 divisors (see below), whose sum is σ = 63383040. Its totient is φ = 28375920.

The previous prime is 45044411. The next prime is 45044443. The reversal of 45044421 is 12444054.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-45044421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45044391 and 45044400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45044411) 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, 29056 + ... + 30566.

It is an arithmetic number, because the mean of its divisors is an integer number (3961440).

Almost surely, 2^45044421 is an apocalyptic number.

It is an amenable number.

45044421 is a deficient number, since it is larger than the sum of its proper divisors (18338619).

45044421 is a wasteful number, since it uses less digits than its factorization.

45044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 45044421 is about 6711.5140616704. The cubic root of 45044421 is about 355.8063295577.

Adding to 45044421 its reverse (12444054), we get a palindrome (57488475).

The spelling of 45044421 in words is "forty-five million, forty-four thousand, four hundred twenty-one".