80365121 has 4 divisors (see below), whose sum is σ = 81682644. Its totient is φ = 79047600.

The previous prime is 80365099. The next prime is 80365169. The reversal of 80365121 is 12156308.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3610000 + 76755121 = 1900^2 + 8761^2 .

It is a cyclic number.

It is not a de Polignac number, because 80365121 - 2⁶ = 80365057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80365721) 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, 658670 + ... + 658791.

It is an arithmetic number, because the mean of its divisors is an integer number (20420661).

Almost surely, 2^80365121 is an apocalyptic number.

It is an amenable number.

80365121 is a deficient number, since it is larger than the sum of its proper divisors (1317523).

80365121 is a wasteful number, since it uses less digits than its factorization.

80365121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317522.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 80365121 is about 8964.6595585109. The cubic root of 80365121 is about 431.5414677105.

The spelling of 80365121 in words is "eighty million, three hundred sixty-five thousand, one hundred twenty-one".