240649 has 4 divisors (see below), whose sum is σ = 251136. Its totient is φ = 230164.

The previous prime is 240641. The next prime is 240659. The reversal of 240649 is 946042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946042 = 2 ⋅473021.

It is a cyclic number.

It is not a de Polignac number, because 240649 - 2³ = 240641 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (240641) 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, 5209 + ... + 5254.

It is an arithmetic number, because the mean of its divisors is an integer number (62784).

2²⁴⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

240649 is a deficient number, since it is larger than the sum of its proper divisors (10487).

240649 is a wasteful number, since it uses less digits than its factorization.

240649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10486.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 240649 is about 490.5598842139. The cubic root of 240649 is about 62.2006161993.

The spelling of 240649 in words is "two hundred forty thousand, six hundred forty-nine".