80042521 has 8 divisors (see below), whose sum is σ = 86284800. Its totient is φ = 73812432.

The previous prime is 80042519. The next prime is 80042531. The reversal of 80042521 is 12524008.

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 80042521 - 2¹ = 80042519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80042492 and 80042501.

It is not an unprimeable number, because it can be changed into a prime (80042531) 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, 14280 + ... + 19078.

It is an arithmetic number, because the mean of its divisors is an integer number (10785600).

Almost surely, 2^80042521 is an apocalyptic number.

It is an amenable number.

80042521 is a deficient number, since it is larger than the sum of its proper divisors (6242279).

80042521 is a wasteful number, since it uses less digits than its factorization.

80042521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 80042521 is about 8946.6485903941. The cubic root of 80042521 is about 430.9632650829.

Adding to 80042521 its reverse (12524008), we get a palindrome (92566529).

The spelling of 80042521 in words is "eighty million, forty-two thousand, five hundred twenty-one".