1253166205 has 8 divisors (see below), whose sum is σ = 1504013400. Its totient is φ = 1002390336.

The previous prime is 1253166197. The next prime is 1253166301. The reversal of 1253166205 is 5026613521.

It can be written as a sum of positive squares in 4 ways, for example, as 165353881 + 1087812324 = 12859^2 + 32982^2 .

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 1253166205 - 2³ = 1253166197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35131 + ... + 61159.

It is an arithmetic number, because the mean of its divisors is an integer number (188001675).

Almost surely, 2^1253166205 is an apocalyptic number.

It is an amenable number.

1253166205 is a deficient number, since it is larger than the sum of its proper divisors (250847195).

1253166205 is an equidigital number, since it uses as much as digits as its factorization.

1253166205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35663.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1253166205 is about 35400.0876411344. The cubic root of 1253166205 is about 1078.1260957547.

Adding to 1253166205 its reverse (5026613521), we get a palindrome (6279779726).

The spelling of 1253166205 in words is "one billion, two hundred fifty-three million, one hundred sixty-six thousand, two hundred five".