61247 has 4 divisors (see below), whose sum is σ = 62160. Its totient is φ = 60336.

The previous prime is 61231. The next prime is 61253. The reversal of 61247 is 74216.

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 61247 - 2⁴ = 61231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347 + ... + 492.

It is an arithmetic number, because the mean of its divisors is an integer number (15540).

2⁶¹²⁴⁷ is an apocalyptic number.

61247 is a deficient number, since it is larger than the sum of its proper divisors (913).

61247 is an equidigital number, since it uses as much as digits as its factorization.

61247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its digits is 336, while the sum is 20.

The square root of 61247 is about 247.4813124258. The cubic root of 61247 is about 39.4180322348.

The spelling of 61247 in words is "sixty-one thousand, two hundred forty-seven".