205040725 has 12 divisors (see below), whose sum is σ = 254499460. Its totient is φ = 163872000.

The previous prime is 205040683. The next prime is 205040747. The reversal of 205040725 is 527040502.

It can be written as a sum of positive squares in 6 ways, for example, as 45927729 + 159112996 = 6777^2 + 12614^2 .

It is not a de Polignac number, because 205040725 - 2¹³ = 205032533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 205040725.

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 11 ways as a sum of consecutive naturals, for example, 26611 + ... + 33439.

Almost surely, 2^205040725 is an apocalyptic number.

205040725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205040725 is a deficient number, since it is larger than the sum of its proper divisors (49458735).

205040725 is a wasteful number, since it uses less digits than its factorization.

205040725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8040 (or 8035 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 205040725 is about 14319.2431713411. The cubic root of 205040725 is about 589.6758968766.

The spelling of 205040725 in words is "two hundred five million, forty thousand, seven hundred twenty-five".