240424421 has 4 divisors (see below), whose sum is σ = 254567052. Its totient is φ = 226281792.

The previous prime is 240424403. The next prime is 240424427. The reversal of 240424421 is 124424042.

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 130279396 + 110145025 = 11414^2 + 10495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240424421 is a prime.

It is a super-4 number, since 4×240424421⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240424427) 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, 7071290 + ... + 7071323.

It is an arithmetic number, because the mean of its divisors is an integer number (63641763).

Almost surely, 2^240424421 is an apocalyptic number.

It is an amenable number.

240424421 is a deficient number, since it is larger than the sum of its proper divisors (14142631).

240424421 is a wasteful number, since it uses less digits than its factorization.

240424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14142630.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 240424421 is about 15505.6254630376. The cubic root of 240424421 is about 621.8126117761.

Adding to 240424421 its reverse (124424042), we get a palindrome (364848463).

The spelling of 240424421 in words is "two hundred forty million, four hundred twenty-four thousand, four hundred twenty-one".