240421427 has 2 divisors, whose sum is σ = 240421428. Its totient is φ = 240421426.

The previous prime is 240421381. The next prime is 240421477. The reversal of 240421427 is 724124042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240421427 - 2¹⁶ = 240355891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240421396 and 240421405.

It is not a weakly prime, because it can be changed into another prime (240421477) 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, 120210713 + 120210714.

It is an arithmetic number, because the mean of its divisors is an integer number (120210714).

Almost surely, 2^240421427 is an apocalyptic number.

240421427 is a deficient number, since it is larger than the sum of its proper divisors (1).

240421427 is an equidigital number, since it uses as much as digits as its factorization.

240421427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 240421427 is about 15505.5289171315. The cubic root of 240421427 is about 621.8100306259.

Adding to 240421427 its reverse (724124042), we get a palindrome (964545469).

The spelling of 240421427 in words is "two hundred forty million, four hundred twenty-one thousand, four hundred twenty-seven".