430140721 has 2 divisors, whose sum is σ = 430140722. Its totient is φ = 430140720.

The previous prime is 430140703. The next prime is 430140761. The reversal of 430140721 is 127041034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299290000 + 130850721 = 17300^2 + 11439^2 .

It is a cyclic number.

It is not a de Polignac number, because 430140721 - 2²¹ = 428043569 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 430140692 and 430140701.

It is not a weakly prime, because it can be changed into another prime (430140761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215070360 + 215070361.

It is an arithmetic number, because the mean of its divisors is an integer number (215070361).

Almost surely, 2^430140721 is an apocalyptic number.

It is an amenable number.

430140721 is a deficient number, since it is larger than the sum of its proper divisors (1).

430140721 is an equidigital number, since it uses as much as digits as its factorization.

430140721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 430140721 is about 20739.8341603784. The cubic root of 430140721 is about 754.8665588764.

Adding to 430140721 its reverse (127041034), we get a palindrome (557181755).

The spelling of 430140721 in words is "four hundred thirty million, one hundred forty thousand, seven hundred twenty-one".