57047421 has 8 divisors (see below), whose sum is σ = 76127904. Its totient is φ = 37999280.

The previous prime is 57047411. The next prime is 57047447. The reversal of 57047421 is 12474075.

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 57047421 - 2⁶ = 57047357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57047411) 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 7 ways as a sum of consecutive naturals, for example, 3615 + ... + 11276.

It is an arithmetic number, because the mean of its divisors is an integer number (9515988).

Almost surely, 2^57047421 is an apocalyptic number.

It is an amenable number.

57047421 is a deficient number, since it is larger than the sum of its proper divisors (19080483).

57047421 is a wasteful number, since it uses less digits than its factorization.

57047421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16171.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 57047421 is about 7552.9743147981. The cubic root of 57047421 is about 384.9568085578.

The spelling of 57047421 in words is "fifty-seven million, forty-seven thousand, four hundred twenty-one".