54021257 has 8 divisors (see below), whose sum is σ = 58279176. Its totient is φ = 49883392.

The previous prime is 54021203. The next prime is 54021259. The reversal of 54021257 is 75212045.

It can be written as a sum of positive squares in 4 ways, for example, as 14280841 + 39740416 = 3779^2 + 6304^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54021257 - 2²⁰ = 52972681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54021259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29078 + ... + 30879.

It is an arithmetic number, because the mean of its divisors is an integer number (7284897).

Almost surely, 2^54021257 is an apocalyptic number.

It is an amenable number.

54021257 is a deficient number, since it is larger than the sum of its proper divisors (4257919).

54021257 is a wasteful number, since it uses less digits than its factorization.

54021257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60027.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 54021257 is about 7349.9154416905. The cubic root of 54021257 is about 378.0259050208.

The spelling of 54021257 in words is "fifty-four million, twenty-one thousand, two hundred fifty-seven".