61286 has 4 divisors (see below), whose sum is σ = 91932. Its totient is φ = 30642.

The previous prime is 61283. The next prime is 61291. The reversal of 61286 is 68216.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61283) 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 as a sum of consecutive naturals, namely, 15320 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (22983).

2⁶¹²⁸⁶ is an apocalyptic number.

61286 is a deficient number, since it is larger than the sum of its proper divisors (30646).

61286 is a wasteful number, since it uses less digits than its factorization.

61286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30645.

The product of its digits is 576, while the sum is 23.

The square root of 61286 is about 247.5600937146. The cubic root of 61286 is about 39.4263971456.

The spelling of 61286 in words is "sixty-one thousand, two hundred eighty-six".