240140521 has 4 divisors (see below), whose sum is σ = 254266452. Its totient is φ = 226014592.

The previous prime is 240140519. The next prime is 240140557. The reversal of 240140521 is 125041042.

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 65610000 + 174530521 = 8100^2 + 13211^2 .

It is not a de Polignac number, because 240140521 - 2¹ = 240140519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240140821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7062940 + ... + 7062973.

It is an arithmetic number, because the mean of its divisors is an integer number (63566613).

Almost surely, 2^240140521 is an apocalyptic number.

It is an amenable number.

240140521 is a deficient number, since it is larger than the sum of its proper divisors (14125931).

240140521 is a wasteful number, since it uses less digits than its factorization.

240140521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14125930.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 240140521 is about 15496.4680169386. The cubic root of 240140521 is about 621.5677640325.

Adding to 240140521 its reverse (125041042), we get a palindrome (365181563).

The spelling of 240140521 in words is "two hundred forty million, one hundred forty thousand, five hundred twenty-one".