240642271 has 4 divisors (see below), whose sum is σ = 240719544. Its totient is φ = 240565000.

The previous prime is 240642263. The next prime is 240642287. The reversal of 240642271 is 172246042.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 240642271 - 2³ = 240642263 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 (240642211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33760 + ... + 40261.

It is an arithmetic number, because the mean of its divisors is an integer number (60179886).

Almost surely, 2^240642271 is an apocalyptic number.

240642271 is a deficient number, since it is larger than the sum of its proper divisors (77273).

240642271 is an equidigital number, since it uses as much as digits as its factorization.

240642271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77272.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 240642271 is about 15512.6487422361. The cubic root of 240642271 is about 622.0003644501. Note that the first 3 decimals are identical.

It can be divided in two parts, 24064 and 2271, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 240642271 in words is "two hundred forty million, six hundred forty-two thousand, two hundred seventy-one".