240840451 has 4 divisors (see below), whose sum is σ = 240871504. Its totient is φ = 240809400.

The previous prime is 240840367. The next prime is 240840469. The reversal of 240840451 is 154048042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 240840451 - 2¹⁵ = 240807683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240840491) 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, 7066 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (60217876).

Almost surely, 2^240840451 is an apocalyptic number.

240840451 is a deficient number, since it is larger than the sum of its proper divisors (31053).

240840451 is a wasteful number, since it uses less digits than its factorization.

240840451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31052.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 240840451 is about 15519.0351182024. The cubic root of 240840451 is about 622.1710662533.

Adding to 240840451 its reverse (154048042), we get a palindrome (394888493).

The spelling of 240840451 in words is "two hundred forty million, eight hundred forty thousand, four hundred fifty-one".