4431121 has 8 divisors (see below), whose sum is σ = 4523904. Its totient is φ = 4339440.

The previous prime is 4431103. The next prime is 4431127. The reversal of 4431121 is 1211344.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4431121 - 2⁹ = 4430609 is a prime.

It is a Duffinian number.

4431121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4431095 and 4431104.

It is not an unprimeable number, because it can be changed into a prime (4431127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16216 + ... + 16486.

It is an arithmetic number, because the mean of its divisors is an integer number (565488).

Almost surely, 2^4431121 is an apocalyptic number.

It is an amenable number.

4431121 is a deficient number, since it is larger than the sum of its proper divisors (92783).

4431121 is a wasteful number, since it uses less digits than its factorization.

4431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its digits is 96, while the sum is 16.

The square root of 4431121 is about 2105.0228027268. The cubic root of 4431121 is about 164.2496816466.

Subtracting from 4431121 its product of digits (96), we obtain a square (4431025 = 2105²).

Adding to 4431121 its reverse (1211344), we get a palindrome (5642465).

The spelling of 4431121 in words is "four million, four hundred thirty-one thousand, one hundred twenty-one".