4621421 has 16 divisors (see below), whose sum is σ = 5475840. Its totient is φ = 3818880.

The previous prime is 4621381. The next prime is 4621439. The reversal of 4621421 is 1241264.

It is a cyclic number.

It is not a de Polignac number, because 4621421 - 2¹⁰ = 4620397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4621393 and 4621402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4621481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33665 + ... + 33801.

It is an arithmetic number, because the mean of its divisors is an integer number (342240).

Almost surely, 2^4621421 is an apocalyptic number.

It is an amenable number.

4621421 is a deficient number, since it is larger than the sum of its proper divisors (854419).

4621421 is a wasteful number, since it uses less digits than its factorization.

4621421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its digits is 384, while the sum is 20.

The square root of 4621421 is about 2149.7490551225. The cubic root of 4621421 is about 166.5681048360.

Adding to 4621421 its reverse (1241264), we get a palindrome (5862685).

The spelling of 4621421 in words is "four million, six hundred twenty-one thousand, four hundred twenty-one".