205125245 has 8 divisors (see below), whose sum is σ = 265085016. Its totient is φ = 151477056.

The previous prime is 205125209. The next prime is 205125253. The reversal of 205125245 is 542521502.

It can be written as a sum of positive squares in 4 ways, for example, as 835396 + 204289849 = 914^2 + 14293^2 .

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 205125245 - 2⁶ = 205125181 is a prime.

It is a super-2 number, since 2×205125245² = 84152732272620050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577822 + ... + 1577951.

It is an arithmetic number, because the mean of its divisors is an integer number (33135627).

Almost surely, 2^205125245 is an apocalyptic number.

It is an amenable number.

205125245 is a deficient number, since it is larger than the sum of its proper divisors (59959771).

205125245 is a wasteful number, since it uses less digits than its factorization.

205125245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155791.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 205125245 is about 14322.1941405638. The cubic root of 205125245 is about 589.7569093360.

Adding to 205125245 its reverse (542521502), we get a palindrome (747646747).

The spelling of 205125245 in words is "two hundred five million, one hundred twenty-five thousand, two hundred forty-five".