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12831485 = 52988493
BaseRepresentation
bin110000111100…
…101011111101
3220010220111012
4300330223331
511241101420
61135005005
7214031402
oct60745375
926126435
1012831485
117274537
124369765
1328735c4
1419c02a9
1511d6dc5
hexc3cafd

12831485 has 8 divisors (see below), whose sum is σ = 15928920. Its totient is φ = 9911104.

The previous prime is 12831463. The next prime is 12831487. The reversal of 12831485 is 58413821.

12831485 is digitally balanced in base 3, 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 4 ways, for example, as 143641 + 12687844 = 379^2 + 3562^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12831485 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12831487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44102 + ... + 44391.

It is an arithmetic number, because the mean of its divisors is an integer number (1991115).

Almost surely, 212831485 is an apocalyptic number.

It is an amenable number.

12831485 is a deficient number, since it is larger than the sum of its proper divisors (3097435).

12831485 is an equidigital number, since it uses as much as digits as its factorization.

12831485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88527.

The product of its digits is 7680, while the sum is 32.

The square root of 12831485 is about 3582.1062239973. The cubic root of 12831485 is about 234.1130593013.

It can be divided in two parts, 128 and 31485, that added together give a palindrome (31613).

The spelling of 12831485 in words is "twelve million, eight hundred thirty-one thousand, four hundred eighty-five".

Divisors: 1 5 29 145 88493 442465 2566297 12831485