172001144 has 32 divisors (see below), whose sum is σ = 380467200. Its totient is φ = 71336160.

The previous prime is 172001131. The next prime is 172001147. The reversal of 172001144 is 441100271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172001147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47804 + ... + 51275.

It is an arithmetic number, because the mean of its divisors is an integer number (11889600).

Almost surely, 2^172001144 is an apocalyptic number.

172001144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

172001144 is an abundant number, since it is smaller than the sum of its proper divisors (208466056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172001144 is a wasteful number, since it uses less digits than its factorization.

172001144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99123 (or 99119 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 172001144 is about 13114.9206631226. The cubic root of 172001144 is about 556.1310096193.

The spelling of 172001144 in words is "one hundred seventy-two million, one thousand, one hundred forty-four".