Search a number
-
+
12970105 = 52989449
BaseRepresentation
bin110001011110…
…100001111001
3220101221122021
4301132201321
511310020410
61141554441
7215146501
oct61364171
926357567
1012970105
1173596a5
124415a21
1328c1725
141a18a01
151212eda
hexc5e879

12970105 has 8 divisors (see below), whose sum is σ = 16101000. Its totient is φ = 10018176.

The previous prime is 12970093. The next prime is 12970109. The reversal of 12970105 is 50107921.

It can be written as a sum of positive squares in 4 ways, for example, as 3254416 + 9715689 = 1804^2 + 3117^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12970105 - 27 = 12969977 is a prime.

It is a super-2 number, since 2×129701052 = 336447247422050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12970105.

It is not an unprimeable number, because it can be changed into a prime (12970109) 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 7 ways as a sum of consecutive naturals, for example, 44580 + ... + 44869.

It is an arithmetic number, because the mean of its divisors is an integer number (2012625).

Almost surely, 212970105 is an apocalyptic number.

It is an amenable number.

12970105 is a deficient number, since it is larger than the sum of its proper divisors (3130895).

12970105 is an equidigital number, since it uses as much as digits as its factorization.

12970105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89483.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 12970105 is about 3601.4031987546. The cubic root of 12970105 is about 234.9530915879.

The spelling of 12970105 in words is "twelve million, nine hundred seventy thousand, one hundred five".

Divisors: 1 5 29 145 89449 447245 2594021 12970105