240581861 has 16 divisors (see below), whose sum is σ = 270783744. Its totient is φ = 212272704.

The previous prime is 240581851. The next prime is 240581921. The reversal of 240581861 is 168185042.

It is a cyclic number.

It is not a de Polignac number, because 240581861 - 2⁶ = 240581797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240581801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21695 + ... + 30851.

It is an arithmetic number, because the mean of its divisors is an integer number (16923984).

Almost surely, 2^240581861 is an apocalyptic number.

It is an amenable number.

240581861 is a deficient number, since it is larger than the sum of its proper divisors (30201883).

240581861 is a wasteful number, since it uses less digits than its factorization.

240581861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 240581861 is about 15510.7014992875. The cubic root of 240581861 is about 621.9483118237.

The spelling of 240581861 in words is "two hundred forty million, five hundred eighty-one thousand, eight hundred sixty-one".