240520861 has 8 divisors (see below), whose sum is σ = 280491200. Its totient is φ = 206160444.

The previous prime is 240520849. The next prime is 240520871. The reversal of 240520861 is 168025042.

It is not a de Polignac number, because 240520861 - 2⁷ = 240520733 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 (240520871) 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, 350271 + ... + 350956.

It is an arithmetic number, because the mean of its divisors is an integer number (35061400).

Almost surely, 2^240520861 is an apocalyptic number.

It is an amenable number.

240520861 is a deficient number, since it is larger than the sum of its proper divisors (39970339).

240520861 is an frugal number, since it uses more digits than its factorization.

240520861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701248 (or 701234 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 240520861 is about 15508.7349903208. The cubic root of 240520861 is about 621.8957419780.

The spelling of 240520861 in words is "two hundred forty million, five hundred twenty thousand, eight hundred sixty-one".