865549242 has 12 divisors (see below), whose sum is σ = 1875356730. Its totient is φ = 288516408.

The previous prime is 865549241. The next prime is 865549253. The reversal of 865549242 is 242945568.

865549242 is a `hidden beast` number, since 8 + 6 + 554 + 92 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 512071641 + 353477601 = 22629^2 + 18801^2 .

It is a super-3 number, since 3×865549242³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (865549241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24043017 + ... + 24043052.

Almost surely, 2^865549242 is an apocalyptic number.

865549242 is an abundant number, since it is smaller than the sum of its proper divisors (1009807488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865549242 is a wasteful number, since it uses less digits than its factorization.

865549242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48086077 (or 48086074 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 865549242 is about 29420.2182520796. The cubic root of 865549242 is about 953.0095663510.

The spelling of 865549242 in words is "eight hundred sixty-five million, five hundred forty-nine thousand, two hundred forty-two".