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45128 = 235641
BaseRepresentation
bin1011000001001000
32021220102
423001020
52421003
6544532
7245366
oct130110
967812
1045128
11309a6
1222148
1317705
1412636
15d588
hexb048

45128 has 8 divisors (see below), whose sum is σ = 84630. Its totient is φ = 22560.

The previous prime is 45127. The next prime is 45131. The reversal of 45128 is 82154.

It can be written as a sum of positive squares in only one way, i.e., 24964 + 20164 = 158^2 + 142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (45121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2813 + ... + 2828.

245128 is an apocalyptic number.

It is an amenable number.

45128 is a deficient number, since it is larger than the sum of its proper divisors (39502).

45128 is a wasteful number, since it uses less digits than its factorization.

45128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5647 (or 5643 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 45128 is about 212.4335190124. The cubic root of 45128 is about 35.6026257374.

The spelling of 45128 in words is "forty-five thousand, one hundred twenty-eight".

Divisors: 1 2 4 8 5641 11282 22564 45128