141247721 has 2 divisors, whose sum is σ = 141247722. Its totient is φ = 141247720.

The previous prime is 141247709. The next prime is 141247723. The reversal of 141247721 is 127742141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74580496 + 66667225 = 8636^2 + 8165^2 .

It is a cyclic number.

It is not a de Polignac number, because 141247721 - 2²² = 137053417 is a prime.

Together with 141247723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (141247723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70623860 + 70623861.

It is an arithmetic number, because the mean of its divisors is an integer number (70623861).

Almost surely, 2^141247721 is an apocalyptic number.

It is an amenable number.

141247721 is a deficient number, since it is larger than the sum of its proper divisors (1).

141247721 is an equidigital number, since it uses as much as digits as its factorization.

141247721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 29.

The square root of 141247721 is about 11884.7684453674. The cubic root of 141247721 is about 520.7874177393.

Adding to 141247721 its reverse (127742141), we get a palindrome (268989862).

The spelling of 141247721 in words is "one hundred forty-one million, two hundred forty-seven thousand, seven hundred twenty-one".