14801981 has 4 divisors (see below), whose sum is σ = 14812572. Its totient is φ = 14791392.

The previous prime is 14801953. The next prime is 14802001. The reversal of 14801981 is 18910841.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18910841 = 43 ⋅439787.

It can be written as a sum of positive squares in 2 ways, for example, as 4239481 + 10562500 = 2059^2 + 3250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14801981 is a prime.

It is a super-2 number, since 2×14801981² = 438197283048722, which contains 22 as substring.

It is a Duffinian 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 (14801921) 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, 2810 + ... + 6123.

It is an arithmetic number, because the mean of its divisors is an integer number (3703143).

Almost surely, 2^14801981 is an apocalyptic number.

It is an amenable number.

14801981 is a deficient number, since it is larger than the sum of its proper divisors (10591).

14801981 is an equidigital number, since it uses as much as digits as its factorization.

14801981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10590.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 14801981 is about 3847.3342719343. The cubic root of 14801981 is about 245.5311591535.

The spelling of 14801981 in words is "fourteen million, eight hundred one thousand, nine hundred eighty-one".