104431021 has 8 divisors (see below), whose sum is σ = 105264000. Its totient is φ = 103601520.

The previous prime is 104431013. The next prime is 104431043. The reversal of 104431021 is 120134401.

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 104431021 - 2³ = 104431013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104430986 and 104431004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104431081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100776 + ... + 101806.

It is an arithmetic number, because the mean of its divisors is an integer number (13158000).

Almost surely, 2^104431021 is an apocalyptic number.

It is an amenable number.

104431021 is a deficient number, since it is larger than the sum of its proper divisors (832979).

104431021 is a wasteful number, since it uses less digits than its factorization.

104431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739.

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

The square root of 104431021 is about 10219.1497200110. The cubic root of 104431021 is about 470.9157053331.

Adding to 104431021 its reverse (120134401), we get a palindrome (224565422).

The spelling of 104431021 in words is "one hundred four million, four hundred thirty-one thousand, twenty-one".