12749487 has 8 divisors (see below), whose sum is σ = 17287680. Its totient is φ = 8355480.

The previous prime is 12749453. The next prime is 12749489. The reversal of 12749487 is 78494721.

It is a happy number.

12749487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12749487 - 2²⁰ = 11700911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35839 + ... + 36192.

It is an arithmetic number, because the mean of its divisors is an integer number (2160960).

Almost surely, 2^12749487 is an apocalyptic number.

12749487 is a deficient number, since it is larger than the sum of its proper divisors (4538193).

12749487 is an equidigital number, since it uses as much as digits as its factorization.

12749487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72093.

The product of its digits is 112896, while the sum is 42.

The square root of 12749487 is about 3570.6423791805. The cubic root of 12749487 is about 233.6133031671.

The spelling of 12749487 in words is "twelve million, seven hundred forty-nine thousand, four hundred eighty-seven".