172001250 has 60 divisors (see below), whose sum is σ = 465718110. Its totient is φ = 45864000.

The previous prime is 172001201. The next prime is 172001251. The reversal of 172001250 is 52100271.

It can be written as a sum of positive squares in 5 ways, for example, as 5049009 + 166952241 = 2247^2 + 12921^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172001251) 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 29 ways as a sum of consecutive naturals, for example, 3606 + ... + 18894.

Almost surely, 2^172001250 is an apocalyptic number.

172001250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172001250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232859055).

172001250 is an abundant number, since it is smaller than the sum of its proper divisors (293716860).

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

172001250 is a wasteful number, since it uses less digits than its factorization.

172001250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15317 (or 15299 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 172001250 is about 13114.9247043206. The cubic root of 172001250 is about 556.1311238625.

The spelling of 172001250 in words is "one hundred seventy-two million, one thousand, two hundred fifty".