87434 has 4 divisors (see below), whose sum is σ = 131154. Its totient is φ = 43716.

The previous prime is 87433. The next prime is 87443. The reversal of 87434 is 43478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43478 = 2 ⋅21739.

It can be written as a sum of positive squares in only one way, i.e., 46225 + 41209 = 215^2 + 203^2 .

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (87433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21857 + ... + 21860.

2⁸⁷⁴³⁴ is an apocalyptic number.

87434 is a deficient number, since it is larger than the sum of its proper divisors (43720).

87434 is a wasteful number, since it uses less digits than its factorization.

87434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43719.

The product of its digits is 2688, while the sum is 26.

The square root of 87434 is about 295.6924077483. The cubic root of 87434 is about 44.3840350577.

Subtracting from 87434 its reverse (43478), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 87434 in words is "eighty-seven thousand, four hundred thirty-four".