8180421 has 8 divisors (see below), whose sum is σ = 10922304. Its totient is φ = 5446080.

The previous prime is 8180413. The next prime is 8180423. The reversal of 8180421 is 1240818.

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

It is not a de Polignac number, because 8180421 - 2³ = 8180413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8180391 and 8180400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8180423) 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 in 7 ways as a sum of consecutive naturals, for example, 1536 + ... + 4326.

It is an arithmetic number, because the mean of its divisors is an integer number (1365288).

Almost surely, 2^8180421 is an apocalyptic number.

It is an amenable number.

8180421 is a deficient number, since it is larger than the sum of its proper divisors (2741883).

8180421 is a wasteful number, since it uses less digits than its factorization.

8180421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 8180421 is about 2860.1435278671. The cubic root of 8180421 is about 201.4923451662.

The spelling of 8180421 in words is "eight million, one hundred eighty thousand, four hundred twenty-one".