12749215 has 16 divisors (see below), whose sum is σ = 15998976. Its totient is φ = 9741600.

The previous prime is 12749197. The next prime is 12749239. The reversal of 12749215 is 51294721.

12749215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12749215 - 2¹¹ = 12747167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12370 + ... + 13360.

It is an arithmetic number, because the mean of its divisors is an integer number (999936).

Almost surely, 2^12749215 is an apocalyptic number.

12749215 is a deficient number, since it is larger than the sum of its proper divisors (3249761).

12749215 is an equidigital number, since it uses as much as digits as its factorization.

12749215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its digits is 5040, while the sum is 31.

The square root of 12749215 is about 3570.6042905928. The cubic root of 12749215 is about 233.6116418382.

The spelling of 12749215 in words is "twelve million, seven hundred forty-nine thousand, two hundred fifteen".