240302421 has 12 divisors (see below), whose sum is σ = 358300800. Its totient is φ = 155033640.

The previous prime is 240302417. The next prime is 240302507. The reversal of 240302421 is 124203042.

240302421 is a `hidden beast` number, since 240 + 3 + 0 + 2 + 421 = 666.

It is not a de Polignac number, because 240302421 - 2² = 240302417 is a prime.

It is a super-2 number, since 2×240302421² = 115490507076922482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 240302394 and 240302403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240302921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430371 + ... + 430928.

It is an arithmetic number, because the mean of its divisors is an integer number (29858400).

Almost surely, 2^240302421 is an apocalyptic number.

It is an amenable number.

240302421 is a deficient number, since it is larger than the sum of its proper divisors (117998379).

240302421 is a wasteful number, since it uses less digits than its factorization.

240302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861336 (or 861333 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 240302421 is about 15501.6909077687. The cubic root of 240302421 is about 621.7074172851.

Adding to 240302421 its reverse (124203042), we get a palindrome (364505463).

The spelling of 240302421 in words is "two hundred forty million, three hundred two thousand, four hundred twenty-one".