240707021 has 2 divisors, whose sum is σ = 240707022. Its totient is φ = 240707020.

The previous prime is 240707009. The next prime is 240707053. The reversal of 240707021 is 120707042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 119464900 = 11011^2 + 10930^2 .

It is a cyclic number.

It is not a de Polignac number, because 240707021 - 2⁶ = 240706957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240700021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120353510 + 120353511.

It is an arithmetic number, because the mean of its divisors is an integer number (120353511).

Almost surely, 2^240707021 is an apocalyptic number.

It is an amenable number.

240707021 is a deficient number, since it is larger than the sum of its proper divisors (1).

240707021 is an equidigital number, since it uses as much as digits as its factorization.

240707021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 240707021 is about 15514.7356084466. The cubic root of 240707021 is about 622.0561469909.

The spelling of 240707021 in words is "two hundred forty million, seven hundred seven thousand, twenty-one".