84443121 has 48 divisors (see below), whose sum is σ = 147470400. Its totient is φ = 47609856.

The previous prime is 84443119. The next prime is 84443123. The reversal of 84443121 is 12134448.

It is an interprime number because it is at equal distance from previous prime (84443119) and next prime (84443123).

It is not a de Polignac number, because 84443121 - 2¹ = 84443119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (84443123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109425 + ... + 110193.

It is an arithmetic number, because the mean of its divisors is an integer number (3072300).

Almost surely, 2^84443121 is an apocalyptic number.

It is an amenable number.

84443121 is a deficient number, since it is larger than the sum of its proper divisors (63027279).

84443121 is a wasteful number, since it uses less digits than its factorization.

84443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 862 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 84443121 is about 9189.2938248812. The cubic root of 84443121 is about 438.7206657282.

Adding to 84443121 its reverse (12134448), we get a palindrome (96577569).

The spelling of 84443121 in words is "eighty-four million, four hundred forty-three thousand, one hundred twenty-one".