270721 has 4 divisors (see below), whose sum is σ = 295344. Its totient is φ = 246100.

The previous prime is 270719. The next prime is 270737. The reversal of 270721 is 127072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 270721 - 2¹ = 270719 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (270701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12295 + ... + 12316.

It is an arithmetic number, because the mean of its divisors is an integer number (73836).

2²⁷⁰⁷²¹ is an apocalyptic number.

It is an amenable number.

270721 is a deficient number, since it is larger than the sum of its proper divisors (24623).

270721 is a wasteful number, since it uses less digits than its factorization.

270721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24622.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 270721 is about 520.3085622974. The cubic root of 270721 is about 64.6905209524.

Adding to 270721 its reverse (127072), we get a palindrome (397793).

The spelling of 270721 in words is "two hundred seventy thousand, seven hundred twenty-one", and thus it is an iban number.