13945249 has 4 divisors (see below), whose sum is σ = 13960836. Its totient is φ = 13929664.

The previous prime is 13945237. The next prime is 13945277. The reversal of 13945249 is 94254931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94254931 = 7499 ⋅12569.

It can be written as a sum of positive squares in 2 ways, for example, as 1918225 + 12027024 = 1385^2 + 3468^2 .

It is a cyclic number.

It is not a de Polignac number, because 13945249 - 2⁷ = 13945121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13945279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6364 + ... + 8269.

It is an arithmetic number, because the mean of its divisors is an integer number (3490209).

Almost surely, 2^13945249 is an apocalyptic number.

It is an amenable number.

13945249 is a deficient number, since it is larger than the sum of its proper divisors (15587).

13945249 is an equidigital number, since it uses as much as digits as its factorization.

13945249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586.

The product of its digits is 38880, while the sum is 37.

The square root of 13945249 is about 3734.3338093963. Note that the first 3 decimals coincide. The cubic root of 13945249 is about 240.6996309574.

The spelling of 13945249 in words is "thirteen million, nine hundred forty-five thousand, two hundred forty-nine".