240142661 has 8 divisors (see below), whose sum is σ = 265664448. Its totient is φ = 215236000.

The previous prime is 240142633. The next prime is 240142667. The reversal of 240142661 is 166241042.

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 240142661 - 2⁶ = 240142597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240142661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240142667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152960 + ... + 154521.

It is an arithmetic number, because the mean of its divisors is an integer number (33208056).

Almost surely, 2^240142661 is an apocalyptic number.

It is an amenable number.

240142661 is a deficient number, since it is larger than the sum of its proper divisors (25521787).

240142661 is a wasteful number, since it uses less digits than its factorization.

240142661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307563.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 240142661 is about 15496.5370647768. The cubic root of 240142661 is about 621.5696103835.

The spelling of 240142661 in words is "two hundred forty million, one hundred forty-two thousand, six hundred sixty-one".