707242021 has 2 divisors, whose sum is σ = 707242022. Its totient is φ = 707242020.

The previous prime is 707242001. The next prime is 707242033. The reversal of 707242021 is 120242707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704637025 + 2604996 = 26545^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 707242021 - 2⁵ = 707241989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (707242001) 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, 353621010 + 353621011.

It is an arithmetic number, because the mean of its divisors is an integer number (353621011).

Almost surely, 2^707242021 is an apocalyptic number.

It is an amenable number.

707242021 is a deficient number, since it is larger than the sum of its proper divisors (1).

707242021 is an equidigital number, since it uses as much as digits as its factorization.

707242021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 707242021 is about 26594.0222794522. The cubic root of 707242021 is about 890.9555116823.

Adding to 707242021 its reverse (120242707), we get a palindrome (827484728).

The spelling of 707242021 in words is "seven hundred seven million, two hundred forty-two thousand, twenty-one".