87871421 has 8 divisors (see below), whose sum is σ = 99165600. Its totient is φ = 77128240.

The previous prime is 87871397. The next prime is 87871429. The reversal of 87871421 is 12417878.

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

It is a cyclic number.

It is not a de Polignac number, because 87871421 - 2¹⁰ = 87870397 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 (87871429) 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, 137411 + ... + 138048.

It is an arithmetic number, because the mean of its divisors is an integer number (12395700).

Almost surely, 2^87871421 is an apocalyptic number.

It is an amenable number.

87871421 is a deficient number, since it is larger than the sum of its proper divisors (11294179).

87871421 is a wasteful number, since it uses less digits than its factorization.

87871421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275499.

The product of its digits is 25088, while the sum is 38.

The square root of 87871421 is about 9373.9757307132. The cubic root of 87871421 is about 444.5792783243.

The spelling of 87871421 in words is "eighty-seven million, eight hundred seventy-one thousand, four hundred twenty-one".