272138 has 4 divisors (see below), whose sum is σ = 408210. Its totient is φ = 136068.

The previous prime is 272131. The next prime is 272141. The reversal of 272138 is 831272.

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., 237169 + 34969 = 487^2 + 187^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 272138.

It is not an unprimeable number, because it can be changed into a prime (272131) by changing a digit.

272138 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 68033 + ... + 68036.

2²⁷²¹³⁸ is an apocalyptic number.

272138 is a deficient number, since it is larger than the sum of its proper divisors (136072).

272138 is a wasteful number, since it uses less digits than its factorization.

272138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136071.

The product of its digits is 672, while the sum is 23.

The square root of 272138 is about 521.6684771002. The cubic root of 272138 is about 64.8031916835.

The spelling of 272138 in words is "two hundred seventy-two thousand, one hundred thirty-eight".