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540625 = 55173
BaseRepresentation
bin10000011111111010001
31000110121011
42003333101
5114300000
615330521
74411111
oct2037721
91013534
10540625
1133a1a8
12220a41
1315c0c7
14101041
15aa2ba
hex83fd1

540625 has 12 divisors (see below), whose sum is σ = 679644. Its totient is φ = 430000.

The previous prime is 540619. The next prime is 540629. The reversal of 540625 is 526045.

It can be written as a sum of positive squares in 6 ways, for example, as 331776 + 208849 = 576^2 + 457^2 .

It is a de Polignac number, because none of the positive numbers 2k-540625 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 540596 and 540605.

It is not an unprimeable number, because it can be changed into a prime (540629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3039 + ... + 3211.

It is an arithmetic number, because the mean of its divisors is an integer number (56637).

2540625 is an apocalyptic number.

It is an amenable number.

540625 is a deficient number, since it is larger than the sum of its proper divisors (139019).

540625 is an frugal number, since it uses more digits than its factorization.

540625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 540625 is about 735.2720584926. The cubic root of 540625 is about 81.4639332555.

The spelling of 540625 in words is "five hundred forty thousand, six hundred twenty-five".

Divisors: 1 5 25 125 173 625 865 3125 4325 21625 108125 540625