61361 has 4 divisors (see below), whose sum is σ = 62832. Its totient is φ = 59892.

The previous prime is 61357. The next prime is 61363. The reversal of 61361 is 16316.

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 61361 - 2² = 61357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61363) 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, 671 + ... + 756.

It is an arithmetic number, because the mean of its divisors is an integer number (15708).

2⁶¹³⁶¹ is an apocalyptic number.

It is an amenable number.

61361 is a deficient number, since it is larger than the sum of its proper divisors (1471).

61361 is a wasteful number, since it uses less digits than its factorization.

61361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its digits is 108, while the sum is 17.

The square root of 61361 is about 247.7115257714. The cubic root of 61361 is about 39.4424735436.

Adding to 61361 its reverse (16316), we get a palindrome (77677).

The spelling of 61361 in words is "sixty-one thousand, three hundred sixty-one".