206442925 has 18 divisors (see below), whose sum is σ = 276027038. Its totient is φ = 152258880.

The previous prime is 206442877. The next prime is 206442931. The reversal of 206442925 is 529244602.

It can be written as a sum of positive squares in 9 ways, for example, as 94887081 + 111555844 = 9741^2 + 10562^2 .

It is not a de Polignac number, because 206442925 - 2⁹ = 206442413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 17 ways as a sum of consecutive naturals, for example, 258627 + ... + 259423.

Almost surely, 2^206442925 is an apocalyptic number.

206442925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206442925 is a deficient number, since it is larger than the sum of its proper divisors (69584113).

206442925 is an frugal number, since it uses more digits than its factorization.

206442925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 206442925 is about 14368.1218327240. The cubic root of 206442925 is about 591.0170383209.

The spelling of 206442925 in words is "two hundred six million, four hundred forty-two thousand, nine hundred twenty-five".