5421538 has 8 divisors (see below), whose sum is σ = 8610732. Its totient is φ = 2551296.

The previous prime is 5421527. The next prime is 5421539. The reversal of 5421538 is 8351245.

It can be written as a sum of positive squares in 2 ways, for example, as 4173849 + 1247689 = 2043^2 + 1117^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (5421539) 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, 79695 + ... + 79762.

Almost surely, 2^5421538 is an apocalyptic number.

5421538 is a deficient number, since it is larger than the sum of its proper divisors (3189194).

5421538 is a wasteful number, since it uses less digits than its factorization.

5421538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159476.

The product of its digits is 4800, while the sum is 28.

The square root of 5421538 is about 2328.4196357186. The cubic root of 5421538 is about 175.6740048488.

It can be divided in two parts, 542 and 1538, that added together give a triangular number (2080 = T₆₄).

The spelling of 5421538 in words is "five million, four hundred twenty-one thousand, five hundred thirty-eight".