272421 has 6 divisors (see below), whose sum is σ = 393510. Its totient is φ = 181608.

The previous prime is 272417. The next prime is 272423. The reversal of 272421 is 124272.

It can be written as a sum of positive squares in only one way, i.e., 260100 + 12321 = 510^2 + 111^2 .

It is not a de Polignac number, because 272421 - 2² = 272417 is a prime.

It is an Ulam number.

272421 is a lucky number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 272394 and 272403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272423) 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, 15126 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (65585).

2²⁷²⁴²¹ is an apocalyptic number.

It is an amenable number.

272421 is a deficient number, since it is larger than the sum of its proper divisors (121089).

272421 is a wasteful number, since it uses less digits than its factorization.

272421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30275 (or 30272 counting only the distinct ones).

The product of its digits is 224, while the sum is 18.

The square root of 272421 is about 521.9396516840. The cubic root of 272421 is about 64.8256471409.

Adding to 272421 its reverse (124272), we get a palindrome (396693).

The spelling of 272421 in words is "two hundred seventy-two thousand, four hundred twenty-one", and thus it is an iban number.