57042121 has 8 divisors (see below), whose sum is σ = 57774080. Its totient is φ = 56313792.

The previous prime is 57042091. The next prime is 57042143. The reversal of 57042121 is 12124075.

It is a happy number.

57042121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57042121 - 2⁷ = 57041993 is a prime.

It is a super-3 number, since 3×57042121³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57042092 and 57042101.

It is not an unprimeable number, because it can be changed into a prime (57042421) 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 7 ways as a sum of consecutive naturals, for example, 43960 + ... + 45238.

It is an arithmetic number, because the mean of its divisors is an integer number (7221760).

Almost surely, 2^57042121 is an apocalyptic number.

It is an amenable number.

57042121 is a deficient number, since it is larger than the sum of its proper divisors (731959).

57042121 is a wasteful number, since it uses less digits than its factorization.

57042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 57042121 is about 7552.6234514902. The cubic root of 57042121 is about 384.9448866968.

Adding to 57042121 its reverse (12124075), we get a palindrome (69166196).

The spelling of 57042121 in words is "fifty-seven million, forty-two thousand, one hundred twenty-one".