5042021 has 4 divisors (see below), whose sum is σ = 5092044.
Its totient is φ = 4992000.
The previous prime is 5041999. The next prime is 5042029. The reversal of 5042021 is 1202405.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 4669921 + 372100 = 2161^2 + 610^2
It is a cyclic number.
It is not a de Polignac number, because 5042021 - 214 = 5025637 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 5041987 and 5042005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (5042029) 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, 24860 + ... + 25061.
It is an arithmetic number, because the mean of its divisors is an integer number (1273011).
Almost surely, 25042021 is an apocalyptic number.
It is an amenable number.
5042021 is a deficient number, since it is larger than the sum of its proper divisors (50023).
5042021 is a wasteful number, since it uses less digits than its factorization.
5042021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 50022.
The product of its (nonzero) digits is 80, while the sum is 14.
The square root of 5042021 is about 2245.4444994254.
Note that the first 4 decimals coincide.
The cubic root of 5042021 is about 171.4752915980.
Adding to 5042021 its reverse (1202405), we get a palindrome (6244426).
The spelling of 5042021 in words is "five million, forty-two thousand, twenty-one".