5421021 has 8 divisors (see below), whose sum is σ = 7249920. Its totient is φ = 3603072.

The previous prime is 5421019. The next prime is 5421043. The reversal of 5421021 is 1201245.

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

It is not a de Polignac number, because 5421021 - 2¹ = 5421019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501 + ... + 3618.

It is an arithmetic number, because the mean of its divisors is an integer number (906240).

Almost surely, 2^5421021 is an apocalyptic number.

It is an amenable number.

5421021 is a deficient number, since it is larger than the sum of its proper divisors (1828899).

5421021 is a wasteful number, since it uses less digits than its factorization.

5421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 5421021 is about 2328.3086135648. The cubic root of 5421021 is about 175.6684205571.

Adding to 5421021 its reverse (1201245), we get a palindrome (6622266).

The spelling of 5421021 in words is "five million, four hundred twenty-one thousand, twenty-one".