132173921 has 4 divisors (see below), whose sum is σ = 144189744. Its totient is φ = 120158100.

The previous prime is 132173911. The next prime is 132173941. The reversal of 132173921 is 129371231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129371231 = 11 ⋅11761021.

It is a cyclic number.

It is not a de Polignac number, because 132173921 - 2¹⁸ = 131911777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (132173911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6007895 + ... + 6007916.

It is an arithmetic number, because the mean of its divisors is an integer number (36047436).

Almost surely, 2^132173921 is an apocalyptic number.

132173921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

132173921 is a deficient number, since it is larger than the sum of its proper divisors (12015823).

132173921 is a wasteful number, since it uses less digits than its factorization.

132173921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12015822.

The product of its digits is 2268, while the sum is 29.

The square root of 132173921 is about 11496.6917415403. The cubic root of 132173921 is about 509.3878609723.

The spelling of 132173921 in words is "one hundred thirty-two million, one hundred seventy-three thousand, nine hundred twenty-one".