10404021 has 4 divisors (see below), whose sum is σ = 13872032. Its totient is φ = 6936012.

The previous prime is 10404019. The next prime is 10404049. The reversal of 10404021 is 12040401.

10404021 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 10404021 - 2¹ = 10404019 is a prime.

It is a super-4 number, since 4×10404021⁴ (a number of 29 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10403988 and 10404006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10404421) 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, 1734001 + ... + 1734006.

It is an arithmetic number, because the mean of its divisors is an integer number (3468008).

Almost surely, 2^10404021 is an apocalyptic number.

It is an amenable number.

10404021 is a deficient number, since it is larger than the sum of its proper divisors (3468011).

10404021 is an equidigital number, since it uses as much as digits as its factorization.

10404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468010.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 10404021 is about 3225.5264686559. The cubic root of 10404021 is about 218.3067043387.

Adding to 10404021 its reverse (12040401), we get a palindrome (22444422).

It can be divided in two parts, 1040402 and 1, that added together give a triangular number (1040403 = T₁₄₄₂).

The spelling of 10404021 in words is "ten million, four hundred four thousand, twenty-one".