61715 has 4 divisors (see below), whose sum is σ = 74064. Its totient is φ = 49368.

The previous prime is 61703. The next prime is 61717. The reversal of 61715 is 51716.

61715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61715 - 2⁶ = 61651 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61717) 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, 6167 + ... + 6176.

It is an arithmetic number, because the mean of its divisors is an integer number (18516).

2⁶¹⁷¹⁵ is an apocalyptic number.

61715 is a deficient number, since it is larger than the sum of its proper divisors (12349).

61715 is a wasteful number, since it uses less digits than its factorization.

61715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12348.

The product of its digits is 210, while the sum is 20.

The square root of 61715 is about 248.4250389957. The cubic root of 61715 is about 39.5181778214.

Subtracting from 61715 its reverse (51716), we obtain a palindrome (9999).

The spelling of 61715 in words is "sixty-one thousand, seven hundred fifteen".