104242021 has 8 divisors (see below), whose sum is σ = 112412664. Its totient is φ = 96093120.

The previous prime is 104242013. The next prime is 104242031. The reversal of 104242021 is 120242401.

It can be written as a sum of positive squares in 4 ways, for example, as 5239521 + 99002500 = 2289^2 + 9950^2 .

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 104242021 - 2³ = 104242013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 104241986 and 104242004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104242031) 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, 5331 + ... + 15391.

It is an arithmetic number, because the mean of its divisors is an integer number (14051583).

Almost surely, 2^104242021 is an apocalyptic number.

It is an amenable number.

104242021 is a deficient number, since it is larger than the sum of its proper divisors (8170643).

104242021 is a wasteful number, since it uses less digits than its factorization.

104242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 104242021 is about 10209.8981875433. The cubic root of 104242021 is about 470.6314449211.

Adding to 104242021 its reverse (120242401), we get a palindrome (224484422).

It can be divided in two parts, 1042420 and 21, that added together give a square (1042441 = 1021²).

The spelling of 104242021 in words is "one hundred four million, two hundred forty-two thousand, twenty-one".