13987134 has 32 divisors (see below), whose sum is σ = 35523840. Its totient is φ = 3996216.

The previous prime is 13987111. The next prime is 13987139. The reversal of 13987134 is 43178931.

It is a happy 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 (13987139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18124 + ... + 18879.

It is an arithmetic number, because the mean of its divisors is an integer number (1110120).

Almost surely, 2^13987134 is an apocalyptic number.

13987134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13987134 is an abundant number, since it is smaller than the sum of its proper divisors (21536706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13987134 is a wasteful number, since it uses less digits than its factorization.

13987134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37021 (or 37015 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 13987134 is about 3739.9377000159. The cubic root of 13987134 is about 240.9403730978.

Adding to 13987134 its product of digits (18144), we get a triangular number (14005278 = T₅₂₉₂).

The spelling of 13987134 in words is "thirteen million, nine hundred eighty-seven thousand, one hundred thirty-four".