345206561 has 8 divisors (see below), whose sum is σ = 399926784. Its totient is φ = 291837600.

The previous prime is 345206549. The next prime is 345206567. The reversal of 345206561 is 165602543.

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

It is a cyclic number.

It is not a de Polignac number, because 345206561 - 2²⁶ = 278097697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345206567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337265 + ... + 338286.

It is an arithmetic number, because the mean of its divisors is an integer number (49990848).

Almost surely, 2^345206561 is an apocalyptic number.

It is an amenable number.

345206561 is a deficient number, since it is larger than the sum of its proper divisors (54720223).

345206561 is an equidigital number, since it uses as much as digits as its factorization.

345206561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675631.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 345206561 is about 18579.7352241629. The cubic root of 345206561 is about 701.4978545213.

The spelling of 345206561 in words is "three hundred forty-five million, two hundred six thousand, five hundred sixty-one".