44135421 has 16 divisors (see below), whose sum is σ = 64708608. Its totient is φ = 26535600.

The previous prime is 44135411. The next prime is 44135471. The reversal of 44135421 is 12453144.

It is not a de Polignac number, because 44135421 - 2⁵ = 44135389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44135391 and 44135400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44135401) 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, 1075 + ... + 9456.

It is an arithmetic number, because the mean of its divisors is an integer number (4044288).

Almost surely, 2^44135421 is an apocalyptic number.

It is an amenable number.

44135421 is a deficient number, since it is larger than the sum of its proper divisors (20573187).

44135421 is a wasteful number, since it uses less digits than its factorization.

44135421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672.

The product of its digits is 1920, while the sum is 24.

The square root of 44135421 is about 6643.4494805033. The cubic root of 44135421 is about 353.3966469153.

Adding to 44135421 its reverse (12453144), we get a palindrome (56588565).

The spelling of 44135421 in words is "forty-four million, one hundred thirty-five thousand, four hundred twenty-one".