240142321 has 4 divisors (see below), whose sum is σ = 246632692. Its totient is φ = 233651952.

The previous prime is 240142313. The next prime is 240142327. The reversal of 240142321 is 123241042.

240142321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 115261696 + 124880625 = 10736^2 + 11175^2 .

It is a cyclic number.

It is not a de Polignac number, because 240142321 - 2³ = 240142313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240142327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245130 + ... + 3245203.

It is an arithmetic number, because the mean of its divisors is an integer number (61658173).

Almost surely, 2^240142321 is an apocalyptic number.

It is an amenable number.

240142321 is a deficient number, since it is larger than the sum of its proper divisors (6490371).

240142321 is an equidigital number, since it uses as much as digits as its factorization.

240142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490370.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 240142321 is about 15496.5260945800. The cubic root of 240142321 is about 621.5693170387.

Adding to 240142321 its reverse (123241042), we get a palindrome (363383363).

It can be divided in two parts, 24014 and 2321, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 240142321 in words is "two hundred forty million, one hundred forty-two thousand, three hundred twenty-one".