8142521 has 8 divisors (see below), whose sum is σ = 8294400. Its totient is φ = 7992160.

The previous prime is 8142517. The next prime is 8142527. The reversal of 8142521 is 1252418.

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 8142521 - 2² = 8142517 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8142527) 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, 16760 + ... + 17238.

It is an arithmetic number, because the mean of its divisors is an integer number (1036800).

Almost surely, 2^8142521 is an apocalyptic number.

It is an amenable number.

8142521 is a deficient number, since it is larger than the sum of its proper divisors (151879).

8142521 is a wasteful number, since it uses less digits than its factorization.

8142521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759.

The product of its digits is 640, while the sum is 23.

The square root of 8142521 is about 2853.5102943568. The cubic root of 8142521 is about 201.1806911263.

Adding to 8142521 its reverse (1252418), we get a palindrome (9394939).

The spelling of 8142521 in words is "eight million, one hundred forty-two thousand, five hundred twenty-one".