54106421 has 2 divisors, whose sum is σ = 54106422. Its totient is φ = 54106420.

The previous prime is 54106417. The next prime is 54106441. The reversal of 54106421 is 12460145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 26122321 = 5290^2 + 5111^2 .

It is a cyclic number.

It is not a de Polignac number, because 54106421 - 2² = 54106417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54106411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27053210 + 27053211.

It is an arithmetic number, because the mean of its divisors is an integer number (27053211).

Almost surely, 2^54106421 is an apocalyptic number.

It is an amenable number.

54106421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54106421 is an equidigital number, since it uses as much as digits as its factorization.

54106421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 54106421 is about 7355.7066961646. The cubic root of 54106421 is about 378.2244521411.

Adding to 54106421 its reverse (12460145), we get a palindrome (66566566).

The spelling of 54106421 in words is "fifty-four million, one hundred six thousand, four hundred twenty-one".