14020691281 has 3 divisors (see below), whose sum is σ = 14020809691. Its totient is φ = 14020572872.

The previous prime is 14020691221. The next prime is 14020691287. The reversal of 14020691281 is 18219602041.

It is a happy number.

The square root of 14020691281 is 118409.

It is a perfect power (a square), and thus also a powerful number.

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.

It can be written as a sum of positive squares in only one way, i.e., 12721809681 + 1298881600 = 112791^2 + 36040^2 .

It is not a de Polignac number, because 14020691281 - 2¹¹ = 14020689233 is a prime.

It is a super-2 number, since 2×14020691281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14020691287) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 59205 + ... + 177613.

Almost surely, 2^14020691281 is an apocalyptic number.

14020691281 is the 118409-th square number.

14020691281 is the 59205-th centered octagonal number.

It is an amenable number.

14020691281 is a deficient number, since it is larger than the sum of its proper divisors (118410).

14020691281 is an frugal number, since it uses more digits than its factorization.

14020691281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236818 (or 118409 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 14020691281 in words is "fourteen billion, twenty million, six hundred ninety-one thousand, two hundred eighty-one".