13749451 has 4 divisors (see below), whose sum is σ = 14223600. Its totient is φ = 13275304.

The previous prime is 13749443. The next prime is 13749467. The reversal of 13749451 is 15494731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13749451 - 2³ = 13749443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13749251) 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 3 ways as a sum of consecutive naturals, for example, 237031 + ... + 237088.

It is an arithmetic number, because the mean of its divisors is an integer number (3555900).

Almost surely, 2^13749451 is an apocalyptic number.

13749451 is a deficient number, since it is larger than the sum of its proper divisors (474149).

13749451 is an equidigital number, since it uses as much as digits as its factorization.

13749451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474148.

The product of its digits is 15120, while the sum is 34.

The square root of 13749451 is about 3708.0252156640. The cubic root of 13749451 is about 239.5678043386.

The spelling of 13749451 in words is "thirteen million, seven hundred forty-nine thousand, four hundred fifty-one".