240330421 has 2 divisors, whose sum is σ = 240330422. Its totient is φ = 240330420.

The previous prime is 240330379. The next prime is 240330437. The reversal of 240330421 is 124033042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237591396 + 2739025 = 15414^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 240330421 - 2²⁷ = 106112693 is a prime.

It is a super-2 number, since 2×240330421² = 115517422516074482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240330451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120165210 + 120165211.

It is an arithmetic number, because the mean of its divisors is an integer number (120165211).

Almost surely, 2^240330421 is an apocalyptic number.

It is an amenable number.

240330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

240330421 is an equidigital number, since it uses as much as digits as its factorization.

240330421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 240330421 is about 15502.5940087458. The cubic root of 240330421 is about 621.7315634305.

Adding to 240330421 its reverse (124033042), we get a palindrome (364363463).

The spelling of 240330421 in words is "two hundred forty million, three hundred thirty thousand, four hundred twenty-one".