61239 has 8 divisors (see below), whose sum is σ = 82800. Its totient is φ = 40256.

The previous prime is 61231. The next prime is 61253. The reversal of 61239 is 93216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61239 - 2³ = 61231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337 + ... + 485.

It is an arithmetic number, because the mean of its divisors is an integer number (10350).

2⁶¹²³⁹ is an apocalyptic number.

61239 is a deficient number, since it is larger than the sum of its proper divisors (21561).

61239 is a wasteful number, since it uses less digits than its factorization.

61239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289.

The product of its digits is 324, while the sum is 21.

The square root of 61239 is about 247.4651490614. The cubic root of 61239 is about 39.4163159168.

It can be divided in two parts, 61 and 239, that added together give a triangular number (300 = T₂₄).

The spelling of 61239 in words is "sixty-one thousand, two hundred thirty-nine".