272646145 has 16 divisors (see below), whose sum is σ = 331441488. Its totient is φ = 215285760.

The previous prime is 272646109. The next prime is 272646161. The reversal of 272646145 is 541646272.

It is a Cunningham number, because it is equal to 16512²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 28005264 + 244640881 = 5292^2 + 15641^2 .

It is not a de Polignac number, because 272646145 - 2²⁷ = 138428417 is a prime.

It is a super-2 number, since 2×272646145² = 148671840766722050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310447 + ... + 311323.

It is an arithmetic number, because the mean of its divisors is an integer number (20715093).

Almost surely, 2^272646145 is an apocalyptic number.

It is an amenable number.

272646145 is a deficient number, since it is larger than the sum of its proper divisors (58795343).

272646145 is an equidigital number, since it uses as much as digits as its factorization.

272646145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620.

The product of its digits is 80640, while the sum is 37.

The square root of 272646145 is about 16512.0000302810. Note that the first 4 decimals coincide. The cubic root of 272646145 is about 648.4350082006.

The spelling of 272646145 in words is "two hundred seventy-two million, six hundred forty-six thousand, one hundred forty-five".