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170072125 = 531817517
BaseRepresentation
bin10100010001100…
…01100000111101
3102212000120002121
422020301200331
5322014302000
624513122541
74133406046
oct1210614075
9385016077
10170072125
1188001783
1248b59451
13293090c2
14188318cd
15ede6b1a
hexa23183d

170072125 has 16 divisors (see below), whose sum is σ = 213451056. Its totient is φ = 135288000.

The previous prime is 170072083. The next prime is 170072171. The reversal of 170072125 is 521270071.

170072125 = 92212 + 92222.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 67272804 + 102799321 = 8202^2 + 10139^2 .

It is not a de Polignac number, because 170072125 - 211 = 170070077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170072125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18867 + ... + 26383.

It is an arithmetic number, because the mean of its divisors is an integer number (13340691).

Almost surely, 2170072125 is an apocalyptic number.

170072125 is the 9222-nd centered square number.

It is an amenable number.

170072125 is a deficient number, since it is larger than the sum of its proper divisors (43378931).

170072125 is an equidigital number, since it uses as much as digits as its factorization.

170072125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 170072125 is about 13041.1703845936. The cubic root of 170072125 is about 554.0441573147.

The spelling of 170072125 in words is "one hundred seventy million, seventy-two thousand, one hundred twenty-five".

Divisors: 1 5 25 125 181 905 4525 7517 22625 37585 187925 939625 1360577 6802885 34014425 170072125