87535121 has 4 divisors (see below), whose sum is σ = 87578112. Its totient is φ = 87492132.

The previous prime is 87535099. The next prime is 87535139. The reversal of 87535121 is 12153578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87535121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87535321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18281 + ... + 22566.

It is an arithmetic number, because the mean of its divisors is an integer number (21894528).

Almost surely, 2^87535121 is an apocalyptic number.

It is an amenable number.

87535121 is a deficient number, since it is larger than the sum of its proper divisors (42991).

87535121 is a wasteful number, since it uses less digits than its factorization.

87535121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42990.

The product of its digits is 8400, while the sum is 32.

The square root of 87535121 is about 9356.0205750094. The cubic root of 87535121 is about 444.0113911668.

Adding to 87535121 its reverse (12153578), we get a palindrome (99688699).

The spelling of 87535121 in words is "eighty-seven million, five hundred thirty-five thousand, one hundred twenty-one".