87865242 has 16 divisors (see below), whose sum is σ = 176306592. Its totient is φ = 29192400.

The previous prime is 87865241. The next prime is 87865247. The reversal of 87865242 is 24256878.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 87865194 and 87865203.

It is not an unprimeable number, because it can be changed into a prime (87865241) 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, 22009 + ... + 25692.

It is an arithmetic number, because the mean of its divisors is an integer number (11019162).

Almost surely, 2^87865242 is an apocalyptic number.

87865242 is an abundant number, since it is smaller than the sum of its proper divisors (88441350).

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

87865242 is a wasteful number, since it uses less digits than its factorization.

87865242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48013.

The product of its digits is 215040, while the sum is 42.

The square root of 87865242 is about 9373.6461422437. The cubic root of 87865242 is about 444.5688573413.

It can be divided in two parts, 8786 and 5242, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 87865242 in words is "eighty-seven million, eight hundred sixty-five thousand, two hundred forty-two".