4918421 has 4 divisors (see below), whose sum is σ = 4923072. Its totient is φ = 4913772.

The previous prime is 4918411. The next prime is 4918427. The reversal of 4918421 is 1248194.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1248194 = 2 ⋅624097.

It is a cyclic number.

It is not a de Polignac number, because 4918421 - 2⁶ = 4918357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4918427) 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, 116 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (1230768).

Almost surely, 2^4918421 is an apocalyptic number.

It is an amenable number.

4918421 is a deficient number, since it is larger than the sum of its proper divisors (4651).

4918421 is a wasteful number, since it uses less digits than its factorization.

4918421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650.

The product of its digits is 2304, while the sum is 29.

The square root of 4918421 is about 2217.7513386311. The cubic root of 4918421 is about 170.0625029686.

The spelling of 4918421 in words is "four million, nine hundred eighteen thousand, four hundred twenty-one".