80041021 has 2 divisors, whose sum is σ = 80041022. Its totient is φ = 80041020.

The previous prime is 80041019. The next prime is 80041037. The reversal of 80041021 is 12014008.

It is a happy number.

It is an a-pointer prime, because the next prime (80041037) can be obtained adding 80041021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68062500 + 11978521 = 8250^2 + 3461^2 .

It is a cyclic number.

It is not a de Polignac number, because 80041021 - 2¹ = 80041019 is a prime.

Together with 80041019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 80040986 and 80041004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80041001) by changing a digit.

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 as a sum of consecutive naturals, namely, 40020510 + 40020511.

It is an arithmetic number, because the mean of its divisors is an integer number (40020511).

Almost surely, 2^80041021 is an apocalyptic number.

It is an amenable number.

80041021 is a deficient number, since it is larger than the sum of its proper divisors (1).

80041021 is an equidigital number, since it uses as much as digits as its factorization.

80041021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 80041021 is about 8946.5647597276. The cubic root of 80041021 is about 430.9605729766.

Adding to 80041021 its reverse (12014008), we get a palindrome (92055029).

It can be divided in two parts, 8004 and 1021, that added together give a square (9025 = 95²).

The spelling of 80041021 in words is "eighty million, forty-one thousand, twenty-one".