145172 has 6 divisors (see below), whose sum is σ = 254058. Its totient is φ = 72584.

The previous prime is 145139. The next prime is 145177. The reversal of 145172 is 271541.

It can be written as a sum of positive squares in only one way, i.e., 80656 + 64516 = 284^2 + 254^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145172.

It is not an unprimeable number, because it can be changed into a prime (145177) by changing a digit.

145172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18143 + ... + 18150.

It is an arithmetic number, because the mean of its divisors is an integer number (42343).

2¹⁴⁵¹⁷² is an apocalyptic number.

It is an amenable number.

145172 is a deficient number, since it is larger than the sum of its proper divisors (108886).

145172 is a wasteful number, since it uses less digits than its factorization.

145172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36297 (or 36295 counting only the distinct ones).

The product of its digits is 280, while the sum is 20.

The square root of 145172 is about 381.0144354221. The cubic root of 145172 is about 52.5566433239.

The spelling of 145172 in words is "one hundred forty-five thousand, one hundred seventy-two".