61187 has 4 divisors (see below), whose sum is σ = 69936. Its totient is φ = 52440.

The previous prime is 61169. The next prime is 61211. The reversal of 61187 is 78116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61487) 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, 4364 + ... + 4377.

It is an arithmetic number, because the mean of its divisors is an integer number (17484).

2⁶¹¹⁸⁷ is an apocalyptic number.

61187 is a deficient number, since it is larger than the sum of its proper divisors (8749).

61187 is an equidigital number, since it uses as much as digits as its factorization.

61187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748.

The product of its digits is 336, while the sum is 23.

The square root of 61187 is about 247.3600614489. The cubic root of 61187 is about 39.4051562046.

The spelling of 61187 in words is "sixty-one thousand, one hundred eighty-seven".