104555021 has 4 divisors (see below), whose sum is σ = 106327200. Its totient is φ = 102782844.

The previous prime is 104554979. The next prime is 104555029. The reversal of 104555021 is 120555401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120555401 = 929 ⋅129769.

It is a cyclic number.

It is not a de Polignac number, because 104555021 - 2¹⁰ = 104553997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104555029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886001 + ... + 886118.

It is an arithmetic number, because the mean of its divisors is an integer number (26581800).

Almost surely, 2^104555021 is an apocalyptic number.

It is an amenable number.

104555021 is a deficient number, since it is larger than the sum of its proper divisors (1772179).

104555021 is an equidigital number, since it uses as much as digits as its factorization.

104555021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772178.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 104555021 is about 10225.2149610656. The cubic root of 104555021 is about 471.1020179512.

The spelling of 104555021 in words is "one hundred four million, five hundred fifty-five thousand, twenty-one".