104002021 has 4 divisors (see below), whose sum is σ = 108523872. Its totient is φ = 99480172.

The previous prime is 104002001. The next prime is 104002027. The reversal of 104002021 is 120200401.

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: 120200401 = 503 ⋅238967.

It is a cyclic number.

It is not a de Polignac number, because 104002021 - 2⁷ = 104001893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104001989 and 104002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104002027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260891 + ... + 2260936.

It is an arithmetic number, because the mean of its divisors is an integer number (27130968).

Almost surely, 2^104002021 is an apocalyptic number.

It is an amenable number.

104002021 is a deficient number, since it is larger than the sum of its proper divisors (4521851).

104002021 is an equidigital number, since it uses as much as digits as its factorization.

104002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521850.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 104002021 is about 10198.1381143815. The cubic root of 104002021 is about 470.2699837087.

Adding to 104002021 its reverse (120200401), we get a palindrome (224202422).

It can be divided in two parts, 10400 and 2021, that added together give a palindrome (12421).

The spelling of 104002021 in words is "one hundred four million, two thousand, twenty-one".