54405121 has 2 divisors, whose sum is σ = 54405122. Its totient is φ = 54405120.

The previous prime is 54405103. The next prime is 54405163. The reversal of 54405121 is 12150445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51552400 + 2852721 = 7180^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 54405121 - 2⁷ = 54404993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54405092 and 54405101.

It is not a weakly prime, because it can be changed into another prime (54405521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27202560 + 27202561.

It is an arithmetic number, because the mean of its divisors is an integer number (27202561).

Almost surely, 2^54405121 is an apocalyptic number.

It is an amenable number.

54405121 is a deficient number, since it is larger than the sum of its proper divisors (1).

54405121 is an equidigital number, since it uses as much as digits as its factorization.

54405121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 54405121 is about 7375.9827141880. The cubic root of 54405121 is about 378.9191841107.

Adding to 54405121 its reverse (12150445), we get a palindrome (66555566).

The spelling of 54405121 in words is "fifty-four million, four hundred five thousand, one hundred twenty-one".