340465421 has 2 divisors, whose sum is σ = 340465422. Its totient is φ = 340465420.

The previous prime is 340465403. The next prime is 340465439. The reversal of 340465421 is 124564043.

It is a balanced prime because it is at equal distance from previous prime (340465403) and next prime (340465439).

It can be written as a sum of positive squares in only one way, i.e., 224580196 + 115885225 = 14986^2 + 10765^2 .

It is an emirp because it is prime and its reverse (124564043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340465421 - 2¹⁸ = 340203277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340465621) 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 as a sum of consecutive naturals, namely, 170232710 + 170232711.

It is an arithmetic number, because the mean of its divisors is an integer number (170232711).

Almost surely, 2^340465421 is an apocalyptic number.

It is an amenable number.

340465421 is a deficient number, since it is larger than the sum of its proper divisors (1).

340465421 is an equidigital number, since it uses as much as digits as its factorization.

340465421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 340465421 is about 18451.7050973616. The cubic root of 340465421 is about 698.2715321098.

The spelling of 340465421 in words is "three hundred forty million, four hundred sixty-five thousand, four hundred twenty-one".