44129021 has 6 divisors (see below), whose sum is σ = 44633466. Its totient is φ = 43626000.

The previous prime is 44129017. The next prime is 44129069. The reversal of 44129021 is 12092144.

It can be written as a sum of positive squares in 3 ways, for example, as 31248100 + 12880921 = 5590^2 + 3589^2 .

It is not a de Polignac number, because 44129021 - 2² = 44129017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44129621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66431 + ... + 67091.

It is an arithmetic number, because the mean of its divisors is an integer number (7438911).

Almost surely, 2^44129021 is an apocalyptic number.

It is an amenable number.

44129021 is a deficient number, since it is larger than the sum of its proper divisors (504445).

44129021 is an frugal number, since it uses more digits than its factorization.

44129021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 44129021 is about 6642.9677855609. The cubic root of 44129021 is about 353.3795642803.

The spelling of 44129021 in words is "forty-four million, one hundred twenty-nine thousand, twenty-one".