185961 has 4 divisors (see below), whose sum is σ = 247952. Its totient is φ = 123972.

The previous prime is 185959. The next prime is 185971. The reversal of 185961 is 169581.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 169581 = 3 ⋅56527.

It is not a de Polignac number, because 185961 - 2¹ = 185959 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185951) 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, 30991 + ... + 30996.

It is an arithmetic number, because the mean of its divisors is an integer number (61988).

2¹⁸⁵⁹⁶¹ is an apocalyptic number.

It is an amenable number.

185961 is a deficient number, since it is larger than the sum of its proper divisors (61991).

185961 is an equidigital number, since it uses as much as digits as its factorization.

185961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61990.

The product of its digits is 2160, while the sum is 30.

The square root of 185961 is about 431.2319561443. The cubic root of 185961 is about 57.0786848057.

The spelling of 185961 in words is "one hundred eighty-five thousand, nine hundred sixty-one".