12919745 has 12 divisors (see below), whose sum is σ = 16471164. Its totient is φ = 9726720.

The previous prime is 12919733. The next prime is 12919747. The reversal of 12919745 is 54791921.

It can be written as a sum of positive squares in 6 ways, for example, as 1168561 + 11751184 = 1081^2 + 3428^2 .

It is not a de Polignac number, because 12919745 - 2⁶ = 12919681 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12919699 and 12919708.

It is not an unprimeable number, because it can be changed into a prime (12919747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3026 + ... + 5915.

It is an arithmetic number, because the mean of its divisors is an integer number (1372597).

Almost surely, 2^12919745 is an apocalyptic number.

It is an amenable number.

12919745 is a deficient number, since it is larger than the sum of its proper divisors (3551419).

12919745 is an equidigital number, since it uses as much as digits as its factorization.

12919745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980 (or 8963 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 12919745 is about 3594.4046794984. The cubic root of 12919745 is about 234.6486071656.

The spelling of 12919745 in words is "twelve million, nine hundred nineteen thousand, seven hundred forty-five".