270240721 has 9 divisors (see below), whose sum is σ = 287369499. Its totient is φ = 254081184.

The previous prime is 270240713. The next prime is 270240749. The reversal of 270240721 is 127042072.

The square root of 270240721 is 16439.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 210395025 + 59845696 = 14505^2 + 7736^2 .

It is not a de Polignac number, because 270240721 - 2³ = 270240713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (270240521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 278980 + ... + 279946.

Almost surely, 2^270240721 is an apocalyptic number.

270240721 is the 16439-th square number.

270240721 is the 8220-th centered octagonal number.

It is an amenable number.

270240721 is a deficient number, since it is larger than the sum of its proper divisors (17128778).

270240721 is an frugal number, since it uses more digits than its factorization.

270240721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The cubic root of 270240721 is about 646.5224305737.

Multiplying 270240721 by its sum of digits (25), we get a square (6756018025 = 82195²).

Adding to 270240721 its reverse (127042072), we get a palindrome (397282793).

The spelling of 270240721 in words is "two hundred seventy million, two hundred forty thousand, seven hundred twenty-one".