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172138 = 286069
BaseRepresentation
bin101010000001101010
322202010111
4222001222
521002023
63404534
71314601
oct520152
9282114
10172138
1110836a
128374a
1360475
1446a38
153600d
hex2a06a

172138 has 4 divisors (see below), whose sum is σ = 258210. Its totient is φ = 86068.

The previous prime is 172127. The next prime is 172147. The reversal of 172138 is 831271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154449 + 17689 = 393^2 + 133^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 43033 + ... + 43036.

2172138 is an apocalyptic number.

172138 is a deficient number, since it is larger than the sum of its proper divisors (86072).

172138 is an equidigital number, since it uses as much as digits as its factorization.

172138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86071.

The product of its digits is 336, while the sum is 22.

The square root of 172138 is about 414.8951674821. The cubic root of 172138 is about 55.6278469275.

The spelling of 172138 in words is "one hundred seventy-two thousand, one hundred thirty-eight".

Divisors: 1 2 86069 172138