340116421 has 4 divisors (see below), whose sum is σ = 340745644. Its totient is φ = 339487200.

The previous prime is 340116383. The next prime is 340116431. The reversal of 340116421 is 124611043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124611043 = 571 ⋅218233.

It can be written as a sum of positive squares in 2 ways, for example, as 100300225 + 239816196 = 10015^2 + 15486^2 .

It is a cyclic number.

It is not a de Polignac number, because 340116421 - 2¹³ = 340108229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340116392 and 340116401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340116431) 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 in 3 ways as a sum of consecutive naturals, for example, 313800 + ... + 314881.

It is an arithmetic number, because the mean of its divisors is an integer number (85186411).

Almost surely, 2^340116421 is an apocalyptic number.

It is an amenable number.

340116421 is a deficient number, since it is larger than the sum of its proper divisors (629223).

340116421 is an equidigital number, since it uses as much as digits as its factorization.

340116421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629222.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 340116421 is about 18442.2455519928. The cubic root of 340116421 is about 698.0328587471.

Adding to 340116421 its reverse (124611043), we get a palindrome (464727464).

The spelling of 340116421 in words is "three hundred forty million, one hundred sixteen thousand, four hundred twenty-one".