4538421 has 6 divisors (see below), whose sum is σ = 6555510. Its totient is φ = 3025608.

The previous prime is 4538407. The next prime is 4538441. The reversal of 4538421 is 1248354.

It can be written as a sum of positive squares in only one way, i.e., 4536900 + 1521 = 2130^2 + 39^2 .

It is not a de Polignac number, because 4538421 - 2⁹ = 4537909 is a prime.

It is a d-powerful number, because it can be written as 4 + 5⁵ + 3¹¹ + 8⁵ + 4¹¹ + 2¹⁷ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4538441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252126 + ... + 252143.

It is an arithmetic number, because the mean of its divisors is an integer number (1092585).

Almost surely, 2^4538421 is an apocalyptic number.

It is an amenable number.

4538421 is a deficient number, since it is larger than the sum of its proper divisors (2017089).

4538421 is a wasteful number, since it uses less digits than its factorization.

4538421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504275 (or 504272 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 4538421 is about 2130.3570123338. The cubic root of 4538421 is about 165.5648957657.

The spelling of 4538421 in words is "four million, five hundred thirty-eight thousand, four hundred twenty-one".