132171821 has 16 divisors (see below), whose sum is σ = 145981440. Its totient is φ = 119105280.

The previous prime is 132171803. The next prime is 132171833. The reversal of 132171821 is 128171231.

It is a cyclic number.

It is not a de Polignac number, because 132171821 - 2⁶ = 132171757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132171841) 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 15 ways as a sum of consecutive naturals, for example, 61556 + ... + 63666.

It is an arithmetic number, because the mean of its divisors is an integer number (9123840).

Almost surely, 2^132171821 is an apocalyptic number.

It is an amenable number.

132171821 is a deficient number, since it is larger than the sum of its proper divisors (13809619).

132171821 is a wasteful number, since it uses less digits than its factorization.

132171821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284.

The product of its digits is 672, while the sum is 26.

The square root of 132171821 is about 11496.6004105562. The cubic root of 132171821 is about 509.3851632132.

The spelling of 132171821 in words is "one hundred thirty-two million, one hundred seventy-one thousand, eight hundred twenty-one".