61858 has 8 divisors (see below), whose sum is σ = 93852. Its totient is φ = 30576.

The previous prime is 61843. The next prime is 61861. The reversal of 61858 is 85816.

It is a happy number.

61858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59049 + 2809 = 243^2 + 53^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216 + ... + 412.

2⁶¹⁸⁵⁸ is an apocalyptic number.

61858 is a deficient number, since it is larger than the sum of its proper divisors (31994).

61858 is a wasteful number, since it uses less digits than its factorization.

61858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356.

The product of its digits is 1920, while the sum is 28.

The square root of 61858 is about 248.7126856435. The cubic root of 61858 is about 39.5486768374.

It can be divided in two parts, 618 and 58, that added together give a palindrome (676).

The spelling of 61858 in words is "sixty-one thousand, eight hundred fifty-eight".