54004021 has 2 divisors, whose sum is σ = 54004022. Its totient is φ = 54004020.

The previous prime is 54004009. The next prime is 54004039. The reversal of 54004021 is 12040045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31203396 + 22800625 = 5586^2 + 4775^2 .

It is a cyclic number.

It is not a de Polignac number, because 54004021 - 2¹³ = 53995829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54003986 and 54004004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54004051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27002010 + 27002011.

It is an arithmetic number, because the mean of its divisors is an integer number (27002011).

Almost surely, 2^54004021 is an apocalyptic number.

It is an amenable number.

54004021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54004021 is an equidigital number, since it uses as much as digits as its factorization.

54004021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 54004021 is about 7348.7428176526. The cubic root of 54004021 is about 377.9856964811.

Adding to 54004021 its reverse (12040045), we get a palindrome (66044066).

The spelling of 54004021 in words is "fifty-four million, four thousand, twenty-one".