80121500 has 24 divisors (see below), whose sum is σ = 174986448. Its totient is φ = 32048400.

The previous prime is 80121497. The next prime is 80121521. The reversal of 80121500 is 512108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79622 + ... + 80621.

It is an arithmetic number, because the mean of its divisors is an integer number (7291102).

Almost surely, 2^80121500 is an apocalyptic number.

It is an amenable number.

80121500 is an abundant number, since it is smaller than the sum of its proper divisors (94864948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80121500 is a wasteful number, since it uses less digits than its factorization.

80121500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160262 (or 160250 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 80121500 is about 8951.0613895783. The cubic root of 80121500 is about 431.1049641802.

Adding to 80121500 its reverse (512108), we get a palindrome (80633608).

The spelling of 80121500 in words is "eighty million, one hundred twenty-one thousand, five hundred".