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BaseRepresentation
bin101111101101…
…000100111001
3212112100012000
4233231010321
511200133101
61124011213
7211202616
oct57550471
925470160
1012505401
117071547
124230b09
13278b05c
14193750d
151170486
hexbed139

12505401 has 24 divisors (see below), whose sum is σ = 19568160. Its totient is φ = 7891992.

The previous prime is 12505393. The next prime is 12505417. The reversal of 12505401 is 10450521.

12505401 is a `hidden beast` number, since 125 + 0 + 540 + 1 = 666.

It is not a de Polignac number, because 12505401 - 23 = 12505393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12505481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9106 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (815340).

Almost surely, 212505401 is an apocalyptic number.

It is an amenable number.

12505401 is a deficient number, since it is larger than the sum of its proper divisors (7062759).

12505401 is a wasteful number, since it uses less digits than its factorization.

12505401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1305 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12505401 is about 3536.2976401881. The cubic root of 12505401 is about 232.1128624960.

Adding to 12505401 its reverse (10450521), we get a palindrome (22955922).

The spelling of 12505401 in words is "twelve million, five hundred five thousand, four hundred one".