13971858 has 16 divisors (see below), whose sum is σ = 29587680. Its totient is φ = 4383296.

The previous prime is 13971851. The next prime is 13971869. The reversal of 13971858 is 85817931.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13971851) 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 7 ways as a sum of consecutive naturals, for example, 68388 + ... + 68591.

It is an arithmetic number, because the mean of its divisors is an integer number (1849230).

Almost surely, 2^13971858 is an apocalyptic number.

13971858 is an abundant number, since it is smaller than the sum of its proper divisors (15615822).

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

13971858 is a wasteful number, since it uses less digits than its factorization.

13971858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137001.

The product of its digits is 60480, while the sum is 42.

The square root of 13971858 is about 3737.8948620848. The cubic root of 13971858 is about 240.8526270813.

The spelling of 13971858 in words is "thirteen million, nine hundred seventy-one thousand, eight hundred fifty-eight".