54120505 has 4 divisors (see below), whose sum is σ = 64944612. Its totient is φ = 43296400.

The previous prime is 54120499. The next prime is 54120509. The reversal of 54120505 is 50502145.

54120505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50502145 = 5 ⋅10100429.

It can be written as a sum of positive squares in 2 ways, for example, as 43283241 + 10837264 = 6579^2 + 3292^2 .

It is not a de Polignac number, because 54120505 - 2⁷ = 54120377 is a prime.

It is a super-2 number, since 2×54120505² = 5858058122910050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54120509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5412046 + ... + 5412055.

It is an arithmetic number, because the mean of its divisors is an integer number (16236153).

Almost surely, 2^54120505 is an apocalyptic number.

It is an amenable number.

54120505 is a deficient number, since it is larger than the sum of its proper divisors (10824107).

54120505 is a wasteful number, since it uses less digits than its factorization.

54120505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10824106.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 54120505 is about 7356.6639858023. The cubic root of 54120505 is about 378.2572667987.

The spelling of 54120505 in words is "fifty-four million, one hundred twenty thousand, five hundred five".