61385 has 4 divisors (see below), whose sum is σ = 73668. Its totient is φ = 49104.

The previous prime is 61381. The next prime is 61403. The reversal of 61385 is 58316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12544 + 48841 = 112^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 61385 - 2² = 61381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61385.

It is not an unprimeable number, because it can be changed into a prime (61381) 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, 6134 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (18417).

2⁶¹³⁸⁵ is an apocalyptic number.

It is an amenable number.

61385 is a deficient number, since it is larger than the sum of its proper divisors (12283).

61385 is a wasteful number, since it uses less digits than its factorization.

61385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12282.

The product of its digits is 720, while the sum is 23.

The square root of 61385 is about 247.7599644818. The cubic root of 61385 is about 39.4476152241.

The spelling of 61385 in words is "sixty-one thousand, three hundred eighty-five".