4890421 has 4 divisors (see below), whose sum is σ = 5103072. Its totient is φ = 4677772.

The previous prime is 4890419. The next prime is 4890481. The reversal of 4890421 is 1240984.

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 4890421 - 2¹ = 4890419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4890421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4890481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106291 + ... + 106336.

It is an arithmetic number, because the mean of its divisors is an integer number (1275768).

Almost surely, 2^4890421 is an apocalyptic number.

It is an amenable number.

4890421 is a deficient number, since it is larger than the sum of its proper divisors (212651).

4890421 is a wasteful number, since it uses less digits than its factorization.

4890421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212650.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 4890421 is about 2211.4296280913. The cubic root of 4890421 is about 169.7391732658.

The spelling of 4890421 in words is "four million, eight hundred ninety thousand, four hundred twenty-one".