44065421 has 4 divisors (see below), whose sum is σ = 44120700. Its totient is φ = 44010144.

The previous prime is 44065403. The next prime is 44065423. The reversal of 44065421 is 12456044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35880100 + 8185321 = 5990^2 + 2861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44065421 is a prime.

It is a super-2 number, since 2×44065421² = 3883522655814482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44065423) 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, 26426 + ... + 28043.

It is an arithmetic number, because the mean of its divisors is an integer number (11030175).

Almost surely, 2^44065421 is an apocalyptic number.

It is an amenable number.

44065421 is a deficient number, since it is larger than the sum of its proper divisors (55279).

44065421 is an equidigital number, since it uses as much as digits as its factorization.

44065421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55278.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 44065421 is about 6638.1790424784. The cubic root of 44065421 is about 353.2097157648.

The spelling of 44065421 in words is "forty-four million, sixty-five thousand, four hundred twenty-one".