13942566 has 48 divisors (see below), whose sum is σ = 33478848. Its totient is φ = 4158000.

The previous prime is 13942553. The next prime is 13942571. The reversal of 13942566 is 66524931.

It is a happy number.

13942566 is a `hidden beast` number, since 1 + 3 + 94 + 2 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13942566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12741 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (697476).

Almost surely, 2^13942566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13942566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16739424).

13942566 is an abundant number, since it is smaller than the sum of its proper divisors (19536282).

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

13942566 is a wasteful number, since it uses less digits than its factorization.

13942566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1134 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 13942566 is about 3733.9745580279. The cubic root of 13942566 is about 240.6841934769.

The spelling of 13942566 in words is "thirteen million, nine hundred forty-two thousand, five hundred sixty-six".