14002140521 has 4 divisors (see below), whose sum is σ = 14002384452. Its totient is φ = 14001896592.

The previous prime is 14002140487. The next prime is 14002140527. The reversal of 14002140521 is 12504120041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11325216400 + 2676924121 = 106420^2 + 51739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14002140521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 14002140493 and 14002140502.

It is not an unprimeable number, because it can be changed into a prime (14002140527) 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, 16655 + ... + 168171.

It is an arithmetic number, because the mean of its divisors is an integer number (3500596113).

Almost surely, 2^14002140521 is an apocalyptic number.

It is an amenable number.

14002140521 is a deficient number, since it is larger than the sum of its proper divisors (243931).

14002140521 is an equidigital number, since it uses as much as digits as its factorization.

14002140521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243930.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 14002140521 its reverse (12504120041), we get a palindrome (26506260562).

The spelling of 14002140521 in words is "fourteen billion, two million, one hundred forty thousand, five hundred twenty-one".