57421755 has 12 divisors (see below), whose sum is σ = 99531120. Its totient is φ = 30624912.

The previous prime is 57421753. The next prime is 57421759. The reversal of 57421755 is 55712475.

It is not a de Polignac number, because 57421755 - 2¹ = 57421753 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (57421753) 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 in 11 ways as a sum of consecutive naturals, for example, 637975 + ... + 638064.

It is an arithmetic number, because the mean of its divisors is an integer number (8294260).

Almost surely, 2^57421755 is an apocalyptic number.

57421755 is a deficient number, since it is larger than the sum of its proper divisors (42109365).

57421755 is a wasteful number, since it uses less digits than its factorization.

57421755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276050 (or 1276047 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 57421755 is about 7577.7143651632. The cubic root of 57421755 is about 385.7969772738.

The spelling of 57421755 in words is "fifty-seven million, four hundred twenty-one thousand, seven hundred fifty-five".