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40285521 = 3225717417
BaseRepresentation
bin1001100110101…
…1010101010001
32210210201100100
42121223111101
540303114041
63555243013
7666264333
oct231532521
983721310
1040285521
1120816121
12115a9469
1384667b3
1454c9453
15380b6b6
hex266b551

40285521 has 12 divisors (see below), whose sum is σ = 58419972. Its totient is φ = 26750976.

The previous prime is 40285501. The next prime is 40285537. The reversal of 40285521 is 12558204.

It is a happy number.

40285521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38937600 + 1347921 = 6240^2 + 1161^2 .

It is not a de Polignac number, because 40285521 - 26 = 40285457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40285501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6396 + ... + 11021.

It is an arithmetic number, because the mean of its divisors is an integer number (4868331).

Almost surely, 240285521 is an apocalyptic number.

It is an amenable number.

40285521 is a deficient number, since it is larger than the sum of its proper divisors (18134451).

40285521 is a wasteful number, since it uses less digits than its factorization.

40285521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17680 (or 17677 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 40285521 is about 6347.0875998366. The cubic root of 40285521 is about 342.8069842546.

The spelling of 40285521 in words is "forty million, two hundred eighty-five thousand, five hundred twenty-one".

Divisors: 1 3 9 257 771 2313 17417 52251 156753 4476169 13428507 40285521