340424561 has 4 divisors (see below), whose sum is σ = 340480500. Its totient is φ = 340368624.

The previous prime is 340424551. The next prime is 340424569. The reversal of 340424561 is 165424043.

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 113018161 + 227406400 = 10631^2 + 15080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340424561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340424569) 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, 17546 + ... + 31443.

It is an arithmetic number, because the mean of its divisors is an integer number (85120125).

Almost surely, 2^340424561 is an apocalyptic number.

It is an amenable number.

340424561 is a deficient number, since it is larger than the sum of its proper divisors (55939).

340424561 is an equidigital number, since it uses as much as digits as its factorization.

340424561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55938.

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

The square root of 340424561 is about 18450.5978493923. The cubic root of 340424561 is about 698.2435972942.

The spelling of 340424561 in words is "three hundred forty million, four hundred twenty-four thousand, five hundred sixty-one".