1025505205 has 8 divisors (see below), whose sum is σ = 1233027000. Its totient is φ = 818790336.

The previous prime is 1025505197. The next prime is 1025505223. The reversal of 1025505205 is 5025055201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 378769444 + 646735761 = 19462^2 + 25431^2 .

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 1025505205 - 2³ = 1025505197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1025505205.

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, 198930 + ... + 204019.

It is an arithmetic number, because the mean of its divisors is an integer number (154128375).

Almost surely, 2^1025505205 is an apocalyptic number.

It is an amenable number.

1025505205 is a deficient number, since it is larger than the sum of its proper divisors (207521795).

1025505205 is an equidigital number, since it uses as much as digits as its factorization.

1025505205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403463.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 1025505205 is about 32023.5101917326. The cubic root of 1025505205 is about 1008.4304625755.

The spelling of 1025505205 in words is "one billion, twenty-five million, five hundred five thousand, two hundred five".