1252786205 has 18 divisors (see below), whose sum is σ = 1653584478. Its totient is φ = 910484080.

The previous prime is 1252786181. The next prime is 1252786207. The reversal of 1252786205 is 5026872521.

1252786205 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1002228964 + 250557241 = 31658^2 + 15829^2 .

It is not a de Polignac number, because 1252786205 - 2⁶ = 1252786141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252786207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 869876 + ... + 871314.

Almost surely, 2^1252786205 is an apocalyptic number.

It is an amenable number.

1252786205 is a deficient number, since it is larger than the sum of its proper divisors (400798273).

1252786205 is an frugal number, since it uses more digits than its factorization.

1252786205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 1252786205 is about 35394.7200158442. The cubic root of 1252786205 is about 1078.0171106544.

The spelling of 1252786205 in words is "one billion, two hundred fifty-two million, seven hundred eighty-six thousand, two hundred five".