44145021 has 4 divisors (see below), whose sum is σ = 58860032. Its totient is φ = 29430012.

The previous prime is 44145011. The next prime is 44145041. The reversal of 44145021 is 12054144.

It is a happy number.

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 not a de Polignac number, because 44145021 - 2⁹ = 44144509 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 (44145011) 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, 7357501 + ... + 7357506.

It is an arithmetic number, because the mean of its divisors is an integer number (14715008).

Almost surely, 2^44145021 is an apocalyptic number.

It is an amenable number.

44145021 is a deficient number, since it is larger than the sum of its proper divisors (14715011).

44145021 is a wasteful number, since it uses less digits than its factorization.

44145021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14715010.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 44145021 is about 6644.1719574376. The cubic root of 44145021 is about 353.4222677718.

Adding to 44145021 its reverse (12054144), we get a palindrome (56199165).

The spelling of 44145021 in words is "forty-four million, one hundred forty-five thousand, twenty-one".