13857149 has 4 divisors (see below), whose sum is σ = 13950300. Its totient is φ = 13764000.

The previous prime is 13857131. The next prime is 13857163. The reversal of 13857149 is 94175831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94175831 = 151 ⋅623681.

It can be written as a sum of positive squares in 2 ways, for example, as 6604900 + 7252249 = 2570^2 + 2693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13857149 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 (13857749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46352 + ... + 46649.

It is an arithmetic number, because the mean of its divisors is an integer number (3487575).

Almost surely, 2^13857149 is an apocalyptic number.

It is an amenable number.

13857149 is a deficient number, since it is larger than the sum of its proper divisors (93151).

13857149 is an equidigital number, since it uses as much as digits as its factorization.

13857149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93150.

The product of its digits is 30240, while the sum is 38.

The square root of 13857149 is about 3722.5191738929. The cubic root of 13857149 is about 240.1916813594.

The spelling of 13857149 in words is "thirteen million, eight hundred fifty-seven thousand, one hundred forty-nine".