5540421 has 16 divisors (see below), whose sum is σ = 7824960. Its totient is φ = 3480960.

The previous prime is 5540411. The next prime is 5540441. The reversal of 5540421 is 1240455.

It is not a de Polignac number, because 5540421 - 2⁶ = 5540357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5540411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3001 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (489060).

Almost surely, 2^5540421 is an apocalyptic number.

It is an amenable number.

5540421 is a deficient number, since it is larger than the sum of its proper divisors (2284539).

5540421 is a wasteful number, since it uses less digits than its factorization.

5540421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 5540421 is about 2353.8098903692. The cubic root of 5540421 is about 176.9487866133.

Adding to 5540421 its reverse (1240455), we get a palindrome (6780876).

The spelling of 5540421 in words is "five million, five hundred forty thousand, four hundred twenty-one".