80142865 has 8 divisors (see below), whose sum is σ = 104914368. Its totient is φ = 58285680.

The previous prime is 80142857. The next prime is 80142869. The reversal of 80142865 is 56824108.

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

It is not a de Polignac number, because 80142865 - 2³ = 80142857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80142865.

It is not an unprimeable number, because it can be changed into a prime (80142869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728517 + ... + 728626.

It is an arithmetic number, because the mean of its divisors is an integer number (13114296).

Almost surely, 2^80142865 is an apocalyptic number.

It is an amenable number.

80142865 is a deficient number, since it is larger than the sum of its proper divisors (24771503).

80142865 is a wasteful number, since it uses less digits than its factorization.

80142865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457159.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 80142865 is about 8952.2547439179. The cubic root of 80142865 is about 431.1432799007.

The spelling of 80142865 in words is "eighty million, one hundred forty-two thousand, eight hundred sixty-five".