171828145 has 8 divisors (see below), whose sum is σ = 208086120. Its totient is φ = 136200960.

The previous prime is 171828143. The next prime is 171828199. The reversal of 171828145 is 541828171.

It can be written as a sum of positive squares in 4 ways, for example, as 78570496 + 93257649 = 8864^2 + 9657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171828145 - 2¹ = 171828143 is a prime.

It is a super-2 number, since 2×171828145² = 59049822828282050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171828143) 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, 157096 + ... + 158185.

It is an arithmetic number, because the mean of its divisors is an integer number (26010765).

Almost surely, 2^171828145 is an apocalyptic number.

It is an amenable number.

171828145 is a deficient number, since it is larger than the sum of its proper divisors (36257975).

171828145 is a wasteful number, since it uses less digits than its factorization.

171828145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315395.

The product of its digits is 17920, while the sum is 37.

The square root of 171828145 is about 13108.3235007380. The cubic root of 171828145 is about 555.9444946144.

The spelling of 171828145 in words is "one hundred seventy-one million, eight hundred twenty-eight thousand, one hundred forty-five".