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72861 = 3149163
BaseRepresentation
bin10001110010011101
310200221120
4101302131
54312421
61321153
7422265
oct216235
9120846
1072861
114a818
12361b9
1327219
141c7a5
15168c6
hex11c9d

72861 has 8 divisors (see below), whose sum is σ = 98400. Its totient is φ = 47952.

The previous prime is 72859. The next prime is 72869. The reversal of 72861 is 16827.

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

It is not a de Polignac number, because 72861 - 21 = 72859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72869) 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, 366 + ... + 528.

It is an arithmetic number, because the mean of its divisors is an integer number (12300).

272861 is an apocalyptic number.

It is an amenable number.

72861 is a deficient number, since it is larger than the sum of its proper divisors (25539).

72861 is a wasteful number, since it uses less digits than its factorization.

72861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315.

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

The square root of 72861 is about 269.9277681158. The cubic root of 72861 is about 41.7668487101.

The spelling of 72861 in words is "seventy-two thousand, eight hundred sixty-one".

Divisors: 1 3 149 163 447 489 24287 72861