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12988925 = 521274091
BaseRepresentation
bin110001100011…
…000111111101
3220102220110022
4301203013331
511311121200
61142221525
7215255405
oct61430775
926386408
1012988925
117371854
1244248a5
1328ca171
141a21805
151218885
hexc631fd

12988925 has 12 divisors (see below), whose sum is σ = 16237056. Its totient is φ = 10306800.

The previous prime is 12988891. The next prime is 12988931. The reversal of 12988925 is 52988921.

It is not a de Polignac number, because 12988925 - 26 = 12988861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1130 + ... + 5220.

It is an arithmetic number, because the mean of its divisors is an integer number (1353088).

Almost surely, 212988925 is an apocalyptic number.

It is an amenable number.

12988925 is a deficient number, since it is larger than the sum of its proper divisors (3248131).

12988925 is a wasteful number, since it uses less digits than its factorization.

12988925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228 (or 4223 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 12988925 is about 3604.0151220548. The cubic root of 12988925 is about 235.0666779255.

The spelling of 12988925 in words is "twelve million, nine hundred eighty-eight thousand, nine hundred twenty-five".

Divisors: 1 5 25 127 635 3175 4091 20455 102275 519557 2597785 12988925