271240021 has 4 divisors (see below), whose sum is σ = 292104652. Its totient is φ = 250375392.

The previous prime is 271239967. The next prime is 271240043. The reversal of 271240021 is 120042172.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61308900 + 209931121 = 7830^2 + 14489^2 .

It is a cyclic number.

It is not a de Polignac number, because 271240021 - 2⁹ = 271239509 is a prime.

It is a super-2 number, since 2×271240021² = 147142297984160882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (271240121) 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 3 ways as a sum of consecutive naturals, for example, 10432296 + ... + 10432321.

It is an arithmetic number, because the mean of its divisors is an integer number (73026163).

Almost surely, 2^271240021 is an apocalyptic number.

It is an amenable number.

271240021 is a deficient number, since it is larger than the sum of its proper divisors (20864631).

271240021 is a wasteful number, since it uses less digits than its factorization.

271240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20864630.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 271240021 is about 16469.3661383795. The cubic root of 271240021 is about 647.3183569434.

Adding to 271240021 its reverse (120042172), we get a palindrome (391282193).

The spelling of 271240021 in words is "two hundred seventy-one million, two hundred forty thousand, twenty-one".