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320725 = 5212829
BaseRepresentation
bin1001110010011010101
3121021221201
41032103111
540230400
610512501
72504026
oct1162325
9537851
10320725
111a9a69
12135731
13b2ca2
1484c4d
156506a
hex4e4d5

320725 has 6 divisors (see below), whose sum is σ = 397730. Its totient is φ = 256560.

The previous prime is 320713. The next prime is 320741. The reversal of 320725 is 527023.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 49284 + 271441 = 222^2 + 521^2 .

It is not a de Polignac number, because 320725 - 25 = 320693 is a prime.

320725 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6390 + ... + 6439.

2320725 is an apocalyptic number.

It is an amenable number.

320725 is a deficient number, since it is larger than the sum of its proper divisors (77005).

320725 is a wasteful number, since it uses less digits than its factorization.

320725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12839 (or 12834 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 320725 is about 566.3258779184. The cubic root of 320725 is about 68.4506544288.

Adding to 320725 its reverse (527023), we get a palindrome (847748).

The spelling of 320725 in words is "three hundred twenty thousand, seven hundred twenty-five".

Divisors: 1 5 25 12829 64145 320725