12867749 has 8 divisors (see below), whose sum is σ = 13261848. Its totient is φ = 12476160.

The previous prime is 12867721. The next prime is 12867761. The reversal of 12867749 is 94776821.

It can be written as a sum of positive squares in 4 ways, for example, as 2512225 + 10355524 = 1585^2 + 3218^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12867749 - 2⁸ = 12867493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12867719) 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, 16529 + ... + 17289.

It is an arithmetic number, because the mean of its divisors is an integer number (1657731).

Almost surely, 2^12867749 is an apocalyptic number.

It is an amenable number.

12867749 is a deficient number, since it is larger than the sum of its proper divisors (394099).

12867749 is an equidigital number, since it uses as much as digits as its factorization.

12867749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255.

The product of its digits is 169344, while the sum is 44.

The square root of 12867749 is about 3587.1644790837. The cubic root of 12867749 is about 234.3333998819. Note that the first 4 decimals are identical.

The spelling of 12867749 in words is "twelve million, eight hundred sixty-seven thousand, seven hundred forty-nine".