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1729225 = 522632
BaseRepresentation
bin110100110001011001001
310020212001101
412212023021
5420313400
6101021401
720461321
oct6461311
93225041
101729225
11a81213
126b4861
13487114
14330281
1524256a
hex1a62c9

1729225 has 9 divisors (see below), whose sum is σ = 2152423. Its totient is φ = 1378120.

The previous prime is 1729207. The next prime is 1729229. The reversal of 1729225 is 5229271.

The square root of 1729225 is 1315.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 622521 + 1106704 = 789^2 + 1052^2 .

It is not a de Polignac number, because 1729225 - 25 = 1729193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1729193 and 1729202.

It is not an unprimeable number, because it can be changed into a prime (1729229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6444 + ... + 6706.

21729225 is an apocalyptic number.

1729225 is the 1315-th square number.

1729225 is the 658-th centered octagonal number.

It is an amenable number.

1729225 is a deficient number, since it is larger than the sum of its proper divisors (423198).

1729225 is an frugal number, since it uses more digits than its factorization.

1729225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 268 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The cubic root of 1729225 is about 120.0283497834.

The spelling of 1729225 in words is "one million, seven hundred twenty-nine thousand, two hundred twenty-five".

Divisors: 1 5 25 263 1315 6575 69169 345845 1729225