80420161 has 8 divisors (see below), whose sum is σ = 83298600. Its totient is φ = 77548800.

The previous prime is 80420117. The next prime is 80420269. The reversal of 80420161 is 16102408.

It can be written as a sum of positive squares in 4 ways, for example, as 3682561 + 76737600 = 1919^2 + 8760^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80420161 - 2⁹ = 80419649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80420101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33675 + ... + 35983.

It is an arithmetic number, because the mean of its divisors is an integer number (10412325).

Almost surely, 2^80420161 is an apocalyptic number.

It is an amenable number.

80420161 is a deficient number, since it is larger than the sum of its proper divisors (2878439).

80420161 is a wasteful number, since it uses less digits than its factorization.

80420161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 80420161 is about 8967.7288652144. The cubic root of 80420161 is about 431.6399624379.

Adding to 80420161 its reverse (16102408), we get a palindrome (96522569).

The spelling of 80420161 in words is "eighty million, four hundred twenty thousand, one hundred sixty-one".