87242 has 8 divisors (see below), whose sum is σ = 132132. Its totient is φ = 43200.

The previous prime is 87223. The next prime is 87251. The reversal of 87242 is 24278.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 3721 = 289^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×87242² = 15222333128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 482.

2⁸⁷²⁴² is an apocalyptic number.

87242 is a deficient number, since it is larger than the sum of its proper divisors (44890).

87242 is a wasteful number, since it uses less digits than its factorization.

87242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its digits is 896, while the sum is 23.

The square root of 87242 is about 295.3675676170. The cubic root of 87242 is about 44.3515229911.

The spelling of 87242 in words is "eighty-seven thousand, two hundred forty-two".