172381001 has 8 divisors (see below), whose sum is σ = 186152064. Its totient is φ = 158682960.

The previous prime is 172380947. The next prime is 172381019. The reversal of 172381001 is 100183271.

It is a happy number.

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 172381001 - 2¹⁴ = 172364617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172381031) 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, 13295 + ... + 22836.

It is an arithmetic number, because the mean of its divisors is an integer number (23269008).

Almost surely, 2^172381001 is an apocalyptic number.

It is an amenable number.

172381001 is a deficient number, since it is larger than the sum of its proper divisors (13771063).

172381001 is a wasteful number, since it uses less digits than its factorization.

172381001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36511.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 172381001 is about 13129.3945404958. The cubic root of 172381001 is about 556.5401056098.

The spelling of 172381001 in words is "one hundred seventy-two million, three hundred eighty-one thousand, one".