13946881 has 4 divisors (see below), whose sum is σ = 15019732. Its totient is φ = 12874032.

The previous prime is 13946879. The next prime is 13946887. The reversal of 13946881 is 18864931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18864931 = 37 ⋅509863.

It can be written as a sum of positive squares in 2 ways, for example, as 6548481 + 7398400 = 2559^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 13946881 - 2¹ = 13946879 is a prime.

It is a super-2 number, since 2×13946881² = 389030979256322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13946887) 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, 536406 + ... + 536431.

It is an arithmetic number, because the mean of its divisors is an integer number (3754933).

It is a Proth number, since it is equal to 3405 ⋅ 2¹² + 1 and 3405 < 2¹².

Almost surely, 2^13946881 is an apocalyptic number.

It is an amenable number.

13946881 is a deficient number, since it is larger than the sum of its proper divisors (1072851).

13946881 is a wasteful number, since it uses less digits than its factorization.

13946881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072850.

The product of its digits is 41472, while the sum is 40.

The square root of 13946881 is about 3734.5523158740. The cubic root of 13946881 is about 240.7090202119.

The spelling of 13946881 in words is "thirteen million, nine hundred forty-six thousand, eight hundred eighty-one".