87602521 has 4 divisors (see below), whose sum is σ = 92213200. Its totient is φ = 82991844.

The previous prime is 87602519. The next prime is 87602531. The reversal of 87602521 is 12520678.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12520678 = 2 ⋅6260339.

It is a cyclic number.

It is not a de Polignac number, because 87602521 - 2¹ = 87602519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87602531) 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, 2305311 + ... + 2305348.

It is an arithmetic number, because the mean of its divisors is an integer number (23053300).

Almost surely, 2^87602521 is an apocalyptic number.

It is an amenable number.

87602521 is a deficient number, since it is larger than the sum of its proper divisors (4610679).

87602521 is a wasteful number, since it uses less digits than its factorization.

87602521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610678.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 87602521 is about 9359.6218406515. The cubic root of 87602521 is about 444.1253213997.

The spelling of 87602521 in words is "eighty-seven million, six hundred two thousand, five hundred twenty-one".