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12505697 = 41305017
BaseRepresentation
bin101111101101…
…001001100001
3212112100120222
4233231021201
511200140242
61124012425
7211203521
oct57551141
925470528
1012505697
117071796
124231115
13278b229
141937681
1511705d2
hexbed261

12505697 has 4 divisors (see below), whose sum is σ = 12810756. Its totient is φ = 12200640.

The previous prime is 12505687. The next prime is 12505709. The reversal of 12505697 is 79650521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 678976 + 11826721 = 824^2 + 3439^2 .

It is a cyclic number.

It is not a de Polignac number, because 12505697 - 24 = 12505681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12505607) 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 3 ways as a sum of consecutive naturals, for example, 152468 + ... + 152549.

It is an arithmetic number, because the mean of its divisors is an integer number (3202689).

Almost surely, 212505697 is an apocalyptic number.

It is an amenable number.

12505697 is a deficient number, since it is larger than the sum of its proper divisors (305059).

12505697 is an equidigital number, since it uses as much as digits as its factorization.

12505697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305058.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 12505697 is about 3536.3394916212. The cubic root of 12505697 is about 232.1146938345.

The spelling of 12505697 in words is "twelve million, five hundred five thousand, six hundred ninety-seven".

Divisors: 1 41 305017 12505697