13122749 has 8 divisors (see below), whose sum is σ = 13860000. Its totient is φ = 12390192.

The previous prime is 13122737. The next prime is 13122751. The reversal of 13122749 is 94722131.

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 13122749 - 2⁸ = 13122493 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 (13122709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5642 + ... + 7620.

It is an arithmetic number, because the mean of its divisors is an integer number (1732500).

Almost surely, 2^13122749 is an apocalyptic number.

13122749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13122749 is a deficient number, since it is larger than the sum of its proper divisors (737251).

13122749 is a wasteful number, since it uses less digits than its factorization.

13122749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347.

The product of its digits is 3024, while the sum is 29.

The square root of 13122749 is about 3622.5335057112. The cubic root of 13122749 is about 235.8712131285.

The spelling of 13122749 in words is "thirteen million, one hundred twenty-two thousand, seven hundred forty-nine".