240642651 has 8 divisors (see below), whose sum is σ = 326295360. Its totient is φ = 157709192.

The previous prime is 240642641. The next prime is 240642671. The reversal of 240642651 is 156246042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240642651 - 2⁶ = 240642587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240642641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679605 + ... + 679958.

It is an arithmetic number, because the mean of its divisors is an integer number (40786920).

Almost surely, 2^240642651 is an apocalyptic number.

240642651 is a deficient number, since it is larger than the sum of its proper divisors (85652709).

240642651 is a wasteful number, since it uses less digits than its factorization.

240642651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359625.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 240642651 is about 15512.6609903008. The cubic root of 240642651 is about 622.0006918517. Note that the first 3 decimals are identical.

Adding to 240642651 its reverse (156246042), we get a palindrome (396888693).

The spelling of 240642651 in words is "two hundred forty million, six hundred forty-two thousand, six hundred fifty-one".