80134821 has 24 divisors (see below), whose sum is σ = 131990040. Its totient is φ = 46411776.

The previous prime is 80134807. The next prime is 80134861. The reversal of 80134821 is 12843108.

It can be written as a sum of positive squares in 4 ways, for example, as 29582721 + 50552100 = 5439^2 + 7110^2 .

It is not a de Polignac number, because 80134821 - 2⁷ = 80134693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80134861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18156 + ... + 22133.

It is an arithmetic number, because the mean of its divisors is an integer number (5499585).

Almost surely, 2^80134821 is an apocalyptic number.

It is an amenable number.

80134821 is a deficient number, since it is larger than the sum of its proper divisors (51855219).

80134821 is a wasteful number, since it uses less digits than its factorization.

80134821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40325 (or 40322 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 80134821 is about 8951.8054603527. The cubic root of 80134821 is about 431.1288546923.

Adding to 80134821 its reverse (12843108), we get a palindrome (92977929).

The spelling of 80134821 in words is "eighty million, one hundred thirty-four thousand, eight hundred twenty-one".