5421009 has 16 divisors (see below), whose sum is σ = 8017344. Its totient is φ = 3230400.

The previous prime is 5421007. The next prime is 5421019. The reversal of 5421009 is 9001245.

It is not a de Polignac number, because 5421009 - 2¹ = 5421007 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5421007) 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 15 ways as a sum of consecutive naturals, for example, 667 + ... + 3359.

It is an arithmetic number, because the mean of its divisors is an integer number (501084).

Almost surely, 2^5421009 is an apocalyptic number.

It is an amenable number.

5421009 is a deficient number, since it is larger than the sum of its proper divisors (2596335).

5421009 is a wasteful number, since it uses less digits than its factorization.

5421009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 5421009 is about 2328.3060365854. The cubic root of 5421009 is about 175.6682909369.

It can be divided in two parts, 542 and 1009, that added together give a palindrome (1551).

The spelling of 5421009 in words is "five million, four hundred twenty-one thousand, nine".