14771981 has 8 divisors (see below), whose sum is σ = 17227200. Its totient is φ = 12661404.

The previous prime is 14771941. The next prime is 14771993. The reversal of 14771981 is 18917741.

It is a happy number.

14771981 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-14771981 is a prime.

It is a super-2 number, since 2×14771981² = 436422845328722, which contains 22 as substring.

It is a Duffinian number.

14771981 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14771941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21191 + ... + 21876.

It is an arithmetic number, because the mean of its divisors is an integer number (2153400).

Almost surely, 2^14771981 is an apocalyptic number.

It is an amenable number.

14771981 is a deficient number, since it is larger than the sum of its proper divisors (2455219).

14771981 is an frugal number, since it uses more digits than its factorization.

14771981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43088 (or 43074 counting only the distinct ones).

The product of its digits is 14112, while the sum is 38.

The square root of 14771981 is about 3843.4334910338. The cubic root of 14771981 is about 245.3651697339.

Subtracting 14771981 from its reverse (18917741), we obtain a triangular number (4145760 = T₂₈₇₉).

The spelling of 14771981 in words is "fourteen million, seven hundred seventy-one thousand, nine hundred eighty-one".