54042561 has 6 divisors (see below), whose sum is σ = 78061490. Its totient is φ = 36028368.

The previous prime is 54042553. The next prime is 54042581. The reversal of 54042561 is 16524045.

54042561 is a `hidden beast` number, since 5 + 404 + 256 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48566961 + 5475600 = 6969^2 + 2340^2 .

It is not a de Polignac number, because 54042561 - 2³ = 54042553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54042581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3002356 + ... + 3002373.

Almost surely, 2^54042561 is an apocalyptic number.

It is an amenable number.

54042561 is a deficient number, since it is larger than the sum of its proper divisors (24018929).

54042561 is a wasteful number, since it uses less digits than its factorization.

54042561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004735 (or 6004732 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 54042561 is about 7351.3645672079. The cubic root of 54042561 is about 378.0755916682.

The spelling of 54042561 in words is "fifty-four million, forty-two thousand, five hundred sixty-one".