240987 has 4 divisors (see below), whose sum is σ = 321320. Its totient is φ = 160656.

The previous prime is 240967. The next prime is 240997. The reversal of 240987 is 789042.

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

It is not a de Polignac number, because 240987 - 2⁷ = 240859 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240967) 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, 40162 + ... + 40167.

It is an arithmetic number, because the mean of its divisors is an integer number (80330).

2²⁴⁰⁹⁸⁷ is an apocalyptic number.

240987 is a deficient number, since it is larger than the sum of its proper divisors (80333).

240987 is an equidigital number, since it uses as much as digits as its factorization.

240987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80332.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 240987 is about 490.9042676531. The cubic root of 240987 is about 62.2297235618.

The spelling of 240987 in words is "two hundred forty thousand, nine hundred eighty-seven".