54390121 has 2 divisors, whose sum is σ = 54390122. Its totient is φ = 54390120.

The previous prime is 54390113. The next prime is 54390169. The reversal of 54390121 is 12109345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44555625 + 9834496 = 6675^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 54390121 - 2³ = 54390113 is a prime.

It is not a weakly prime, because it can be changed into another prime (54390181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27195060 + 27195061.

It is an arithmetic number, because the mean of its divisors is an integer number (27195061).

Almost surely, 2^54390121 is an apocalyptic number.

It is an amenable number.

54390121 is a deficient number, since it is larger than the sum of its proper divisors (1).

54390121 is an equidigital number, since it uses as much as digits as its factorization.

54390121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 54390121 is about 7374.9658304293. The cubic root of 54390121 is about 378.8843570571.

Adding to 54390121 its reverse (12109345), we get a palindrome (66499466).

The spelling of 54390121 in words is "fifty-four million, three hundred ninety thousand, one hundred twenty-one".