272171945 has 4 divisors (see below), whose sum is σ = 326606340. Its totient is φ = 217737552.

The previous prime is 272171929. The next prime is 272171947. The reversal of 272171945 is 549171272.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68624656 + 203547289 = 8284^2 + 14267^2 .

It is a cyclic number.

It is not a de Polignac number, because 272171945 - 2⁴ = 272171929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 272171899 and 272171908.

It is not an unprimeable number, because it can be changed into a prime (272171947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27217190 + ... + 27217199.

It is an arithmetic number, because the mean of its divisors is an integer number (81651585).

Almost surely, 2^272171945 is an apocalyptic number.

It is an amenable number.

272171945 is a deficient number, since it is larger than the sum of its proper divisors (54434395).

272171945 is an equidigital number, since it uses as much as digits as its factorization.

272171945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54434394.

The product of its digits is 35280, while the sum is 38.

The square root of 272171945 is about 16497.6345274103. The cubic root of 272171945 is about 648.0588596956.

The spelling of 272171945 in words is "two hundred seventy-two million, one hundred seventy-one thousand, nine hundred forty-five".