340002421 has 8 divisors (see below), whose sum is σ = 376448544. Its totient is φ = 304479120.

The previous prime is 340002407. The next prime is 340002433. The reversal of 340002421 is 124200043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-340002421 is a prime.

It is a super-2 number, since 2×340002421² = 231203292571722482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340002395 and 340002404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340002401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229930 + ... + 231403.

It is an arithmetic number, because the mean of its divisors is an integer number (47056068).

Almost surely, 2^340002421 is an apocalyptic number.

It is an amenable number.

340002421 is a deficient number, since it is larger than the sum of its proper divisors (36446123).

340002421 is a wasteful number, since it uses less digits than its factorization.

340002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461411.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 340002421 is about 18439.1545630487. The cubic root of 340002421 is about 697.9548612994.

Adding to 340002421 its reverse (124200043), we get a palindrome (464202464).

The spelling of 340002421 in words is "three hundred forty million, two thousand, four hundred twenty-one".