57782121 has 4 divisors (see below), whose sum is σ = 77042832. Its totient is φ = 38521412.

The previous prime is 57782119. The next prime is 57782149. The reversal of 57782121 is 12128775.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57782121 - 2¹ = 57782119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57782191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9630351 + ... + 9630356.

It is an arithmetic number, because the mean of its divisors is an integer number (19260708).

Almost surely, 2^57782121 is an apocalyptic number.

It is an amenable number.

57782121 is a deficient number, since it is larger than the sum of its proper divisors (19260711).

57782121 is a wasteful number, since it uses less digits than its factorization.

57782121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19260710.

The product of its digits is 7840, while the sum is 33.

The square root of 57782121 is about 7601.4551896331. The cubic root of 57782121 is about 386.6023531395.

The spelling of 57782121 in words is "fifty-seven million, seven hundred eighty-two thousand, one hundred twenty-one".