14245240721 has 2 divisors, whose sum is σ = 14245240722. Its totient is φ = 14245240720.

The previous prime is 14245240657. The next prime is 14245240727. The reversal of 14245240721 is 12704254241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7503024400 + 6742216321 = 86620^2 + 82111^2 .

It is a cyclic number.

It is not a de Polignac number, because 14245240721 - 2⁶ = 14245240657 is a prime.

It is not a weakly prime, because it can be changed into another prime (14245240727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7122620360 + 7122620361.

It is an arithmetic number, because the mean of its divisors is an integer number (7122620361).

Almost surely, 2^14245240721 is an apocalyptic number.

It is an amenable number.

14245240721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14245240721 is an equidigital number, since it uses as much as digits as its factorization.

14245240721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

Adding to 14245240721 its reverse (12704254241), we get a palindrome (26949494962).

The spelling of 14245240721 in words is "fourteen billion, two hundred forty-five million, two hundred forty thousand, seven hundred twenty-one".