272617421 has 6 divisors (see below), whose sum is σ = 273564522. Its totient is φ = 271672320.

The previous prime is 272617399. The next prime is 272617447. The reversal of 272617421 is 124716272.

It can be written as a sum of positive squares in 3 ways, for example, as 9853321 + 262764100 = 3139^2 + 16210^2 .

It is not a de Polignac number, because 272617421 - 2²⁶ = 205508557 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 (272617451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354125 + ... + 354893.

It is an arithmetic number, because the mean of its divisors is an integer number (45594087).

Almost surely, 2^272617421 is an apocalyptic number.

It is an amenable number.

272617421 is a deficient number, since it is larger than the sum of its proper divisors (947101).

272617421 is an frugal number, since it uses more digits than its factorization.

272617421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1230 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 272617421 is about 16511.1302157060. The cubic root of 272617421 is about 648.4122359472.

The spelling of 272617421 in words is "two hundred seventy-two million, six hundred seventeen thousand, four hundred twenty-one".