32166421 has 8 divisors (see below), whose sum is σ = 36812160. Its totient is φ = 27533328.

The previous prime is 32166359. The next prime is 32166439. The reversal of 32166421 is 12466123.

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 32166421 - 2¹³ = 32158229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32166521) 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, 3135 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (4601520).

Almost surely, 2^32166421 is an apocalyptic number.

It is an amenable number.

32166421 is a deficient number, since it is larger than the sum of its proper divisors (4645739).

32166421 is an equidigital number, since it uses as much as digits as its factorization.

32166421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its digits is 1728, while the sum is 25.

The square root of 32166421 is about 5671.5448512729. The cubic root of 32166421 is about 318.0296275285.

The spelling of 32166421 in words is "thirty-two million, one hundred sixty-six thousand, four hundred twenty-one".