2042421 has 8 divisors (see below), whose sum is σ = 2744544. Its totient is φ = 1350960.

The previous prime is 2042419. The next prime is 2042429. The reversal of 2042421 is 1242402.

2042421 = 54² + 55² + ... + 184².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2042421 - 2¹ = 2042419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2042421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2206 + ... + 2991.

It is an arithmetic number, because the mean of its divisors is an integer number (343068).

2^2042421 is an apocalyptic number.

It is an amenable number.

2042421 is a deficient number, since it is larger than the sum of its proper divisors (702123).

2042421 is a wasteful number, since it uses less digits than its factorization.

2042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2042421 is about 1429.1329539270. The cubic root of 2042421 is about 126.8766653506.

Adding to 2042421 its reverse (1242402), we get a palindrome (3284823).

The spelling of 2042421 in words is "two million, forty-two thousand, four hundred twenty-one".