205426945 has 8 divisors (see below), whose sum is σ = 248454144. Its totient is φ = 163047024.

The previous prime is 205426937. The next prime is 205426973. The reversal of 205426945 is 549624502.

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 205426945 - 2³ = 205426937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161119 + ... + 162388.

It is an arithmetic number, because the mean of its divisors is an integer number (31056768).

Almost surely, 2^205426945 is an apocalyptic number.

It is an amenable number.

205426945 is a deficient number, since it is larger than the sum of its proper divisors (43027199).

205426945 is a wasteful number, since it uses less digits than its factorization.

205426945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323639.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 205426945 is about 14332.7228745971. The cubic root of 205426945 is about 590.0459075645.

The spelling of 205426945 in words is "two hundred five million, four hundred twenty-six thousand, nine hundred forty-five".