1253205205 has 16 divisors (see below), whose sum is σ = 1724811264. Its totient is φ = 856275840.

The previous prime is 1253205199. The next prime is 1253205229. The reversal of 1253205205 is 5025023521.

It is a happy number.

It is not a de Polignac number, because 1253205205 - 2⁷ = 1253205077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253205205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53877 + ... + 73546.

It is an arithmetic number, because the mean of its divisors is an integer number (107800704).

Almost surely, 2^1253205205 is an apocalyptic number.

It is an amenable number.

1253205205 is a deficient number, since it is larger than the sum of its proper divisors (471606059).

1253205205 is a wasteful number, since it uses less digits than its factorization.

1253205205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127716.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1253205205 is about 35400.6384829426. The cubic root of 1253205205 is about 1078.1372798209.

Adding to 1253205205 its reverse (5025023521), we get a palindrome (6278228726).

The spelling of 1253205205 in words is "one billion, two hundred fifty-three million, two hundred five thousand, two hundred five".