240000421 has 4 divisors (see below), whose sum is σ = 243288172. Its totient is φ = 236712672.

The previous prime is 240000401. The next prime is 240000437. The reversal of 240000421 is 124000042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166281025 + 73719396 = 12895^2 + 8586^2 .

It is a cyclic number.

It is not a de Polignac number, because 240000421 - 2²⁵ = 206445989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240000401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643766 + ... + 1643911.

It is an arithmetic number, because the mean of its divisors is an integer number (60822043).

Almost surely, 2^240000421 is an apocalyptic number.

It is an amenable number.

240000421 is a deficient number, since it is larger than the sum of its proper divisors (3287751).

240000421 is an equidigital number, since it uses as much as digits as its factorization.

240000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287750.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 240000421 is about 15491.9469725403. The cubic root of 240000421 is about 621.4468645641.

Adding to 240000421 its reverse (124000042), we get a palindrome (364000463).

The spelling of 240000421 in words is "two hundred forty million, four hundred twenty-one", and thus it is an aban number.