43925021 has 12 divisors (see below), whose sum is σ = 51555132. Its totient is φ = 37312128.

The previous prime is 43925003. The next prime is 43925033. The reversal of 43925021 is 12052934.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 38812900 = 2261^2 + 6230^2 .

It is not a de Polignac number, because 43925021 - 2¹⁸ = 43662877 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 (43925041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1571 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (4296261).

Almost surely, 2^43925021 is an apocalyptic number.

It is an amenable number.

43925021 is a deficient number, since it is larger than the sum of its proper divisors (7630111).

43925021 is a wasteful number, since it uses less digits than its factorization.

43925021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060 (or 8053 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 43925021 is about 6627.5954161370. The cubic root of 43925021 is about 352.8341877091.

Adding to 43925021 its reverse (12052934), we get a palindrome (55977955).

The spelling of 43925021 in words is "forty-three million, nine hundred twenty-five thousand, twenty-one".