14138781 has 8 divisors (see below), whose sum is σ = 19960704. Its totient is φ = 8871360.

The previous prime is 14138779. The next prime is 14138833. The reversal of 14138781 is 18783141.

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

It is not a de Polignac number, because 14138781 - 2¹ = 14138779 is a prime.

It is a super-2 number, since 2×14138781² = 399810256331922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14138711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138565 + ... + 138666.

It is an arithmetic number, because the mean of its divisors is an integer number (2495088).

Almost surely, 2^14138781 is an apocalyptic number.

It is an amenable number.

14138781 is a deficient number, since it is larger than the sum of its proper divisors (5821923).

14138781 is a wasteful number, since it uses less digits than its factorization.

14138781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277251.

The product of its digits is 5376, while the sum is 33.

The square root of 14138781 is about 3760.1570445927. The cubic root of 14138781 is about 241.8079949138.

The spelling of 14138781 in words is "fourteen million, one hundred thirty-eight thousand, seven hundred eighty-one".