4049421 has 4 divisors (see below), whose sum is σ = 5399232. Its totient is φ = 2699612.

The previous prime is 4049401. The next prime is 4049429. The reversal of 4049421 is 1249404.

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 not a de Polignac number, because 4049421 - 2⁵ = 4049389 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 4049391 and 4049400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4049429) 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, 674901 + ... + 674906.

It is an arithmetic number, because the mean of its divisors is an integer number (1349808).

Almost surely, 2^4049421 is an apocalyptic number.

It is an amenable number.

4049421 is a deficient number, since it is larger than the sum of its proper divisors (1349811).

4049421 is a wasteful number, since it uses less digits than its factorization.

4049421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349810.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 4049421 is about 2012.3173209015. The cubic root of 4049421 is about 159.3911889745.

The spelling of 4049421 in words is "four million, forty-nine thousand, four hundred twenty-one".