10042421 has 4 divisors (see below), whose sum is σ = 10479072. Its totient is φ = 9605772.

The previous prime is 10042411. The next prime is 10042433. The reversal of 10042421 is 12424001.

10042421 is digitally balanced in base 2, because in such base 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10042421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10042396 and 10042405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10042411) 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, 218291 + ... + 218336.

It is an arithmetic number, because the mean of its divisors is an integer number (2619768).

Almost surely, 2^10042421 is an apocalyptic number.

It is an amenable number.

10042421 is a deficient number, since it is larger than the sum of its proper divisors (436651).

10042421 is an equidigital number, since it uses as much as digits as its factorization.

10042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436650.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 10042421 is about 3168.9779109360. The cubic root of 10042421 is about 215.7476834850.

Adding to 10042421 its reverse (12424001), we get a palindrome (22466422).

The spelling of 10042421 in words is "ten million, forty-two thousand, four hundred twenty-one".