340268561 has 4 divisors (see below), whose sum is σ = 340376292. Its totient is φ = 340160832.

The previous prime is 340268519. The next prime is 340268567. The reversal of 340268561 is 165862043.

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 322417936 + 17850625 = 17956^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 340268561 - 2⁶ = 340268497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340268567) 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, 48980 + ... + 55493.

It is an arithmetic number, because the mean of its divisors is an integer number (85094073).

Almost surely, 2^340268561 is an apocalyptic number.

It is an amenable number.

340268561 is a deficient number, since it is larger than the sum of its proper divisors (107731).

340268561 is a wasteful number, since it uses less digits than its factorization.

340268561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107730.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 340268561 is about 18446.3698596770. The cubic root of 340268561 is about 698.1369239844.

The spelling of 340268561 in words is "three hundred forty million, two hundred sixty-eight thousand, five hundred sixty-one".