12751905 has 16 divisors (see below), whose sum is σ = 20484864. Its totient is φ = 6773760.

The previous prime is 12751901. The next prime is 12751919. The reversal of 12751905 is 50915721.

It is not a de Polignac number, because 12751905 - 2² = 12751901 is a prime.

It is a super-2 number, since 2×12751905² = 325222162258050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12751901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2497 + ... + 5633.

It is an arithmetic number, because the mean of its divisors is an integer number (1280304).

Almost surely, 2^12751905 is an apocalyptic number.

12751905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12751905 is a deficient number, since it is larger than the sum of its proper divisors (7732959).

12751905 is a wasteful number, since it uses less digits than its factorization.

12751905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 12751905 is about 3570.9809576642. The cubic root of 12751905 is about 233.6280708530.

The spelling of 12751905 in words is "twelve million, seven hundred fifty-one thousand, nine hundred five".