240251 has 4 divisors (see below), whose sum is σ = 262104. Its totient is φ = 218400.

The previous prime is 240209. The next prime is 240257. The reversal of 240251 is 152042.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240257) 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, 10910 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (65526).

2²⁴⁰²⁵¹ is an apocalyptic number.

240251 is a deficient number, since it is larger than the sum of its proper divisors (21853).

240251 is a wasteful number, since it uses less digits than its factorization.

240251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21852.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 240251 is about 490.1540574146. The cubic root of 240251 is about 62.1663068866.

Adding to 240251 its reverse (152042), we get a palindrome (392293).

Subtracting from 240251 its reverse (152042), we obtain a square (88209 = 297²).

The spelling of 240251 in words is "two hundred forty thousand, two hundred fifty-one".