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172061 = 732357
BaseRepresentation
bin101010000000011101
322202000122
4222000131
521001221
63404325
71314431
oct520035
9282018
10172061
111082aa
12836a5
1360416
14469c1
1535eab
hex2a01d

172061 has 4 divisors (see below), whose sum is σ = 174492. Its totient is φ = 169632.

The previous prime is 172049. The next prime is 172069. The reversal of 172061 is 160271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160271 = 293547.

It can be written as a sum of positive squares in 2 ways, for example, as 62500 + 109561 = 250^2 + 331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-172061 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 (172069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (43623).

2172061 is an apocalyptic number.

It is an amenable number.

172061 is a deficient number, since it is larger than the sum of its proper divisors (2431).

172061 is an equidigital number, since it uses as much as digits as its factorization.

172061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 172061 is about 414.8023625776. The cubic root of 172061 is about 55.6195512906.

The spelling of 172061 in words is "one hundred seventy-two thousand, sixty-one".

Divisors: 1 73 2357 172061