61287 has 8 divisors (see below), whose sum is σ = 84480. Its totient is φ = 39480.

The previous prime is 61283. The next prime is 61291. The reversal of 61287 is 78216.

It is an interprime number because it is at equal distance from previous prime (61283) and next prime (61291).

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

It is not a de Polignac number, because 61287 - 2² = 61283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61283) 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, 237 + ... + 422.

It is an arithmetic number, because the mean of its divisors is an integer number (10560).

2⁶¹²⁸⁷ is an apocalyptic number.

61287 is a deficient number, since it is larger than the sum of its proper divisors (23193).

61287 is a wasteful number, since it uses less digits than its factorization.

61287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its digits is 672, while the sum is 24.

The square root of 61287 is about 247.5621134180. The cubic root of 61287 is about 39.4266115838.

The spelling of 61287 in words is "sixty-one thousand, two hundred eighty-seven".