57061 has 4 divisors (see below), whose sum is σ = 58432. Its totient is φ = 55692.

The previous prime is 57059. The next prime is 57073. The reversal of 57061 is 16075.

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 57061 - 2¹ = 57059 is a prime.

It is a Duffinian number.

57061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57041) 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 3 ways as a sum of consecutive naturals, for example, 621 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (14608).

2⁵⁷⁰⁶¹ is an apocalyptic number.

It is an amenable number.

57061 is a deficient number, since it is larger than the sum of its proper divisors (1371).

57061 is a wasteful number, since it uses less digits than its factorization.

57061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 57061 is about 238.8744440077. The cubic root of 57061 is about 38.4987349896.

The spelling of 57061 in words is "fifty-seven thousand, sixty-one".