54405421 has 16 divisors (see below), whose sum is σ = 65116800. Its totient is φ = 44468928.

The previous prime is 54405397. The next prime is 54405431. The reversal of 54405421 is 12450445.

It is a happy number.

It is not a de Polignac number, because 54405421 - 2¹⁵ = 54372653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54405431) 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, 15235 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (4069800).

Almost surely, 2^54405421 is an apocalyptic number.

It is an amenable number.

54405421 is a deficient number, since it is larger than the sum of its proper divisors (10711379).

54405421 is a wasteful number, since it uses less digits than its factorization.

54405421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 54405421 is about 7376.0030504332. The cubic root of 54405421 is about 378.9198805865.

Adding to 54405421 its reverse (12450445), we get a palindrome (66855866).

The spelling of 54405421 in words is "fifty-four million, four hundred five thousand, four hundred twenty-one".