1252091205 has 24 divisors (see below), whose sum is σ = 2174301792. Its totient is φ = 666548064.

The previous prime is 1252091201. The next prime is 1252091219. The reversal of 1252091205 is 5021902521.

1252091205 is a `hidden beast` number, since 12 + 520 + 9 + 120 + 5 = 666.

It is not a de Polignac number, because 1252091205 - 2² = 1252091201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252091201) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 819 + ... + 50048.

It is an arithmetic number, because the mean of its divisors is an integer number (90595908).

Almost surely, 2^1252091205 is an apocalyptic number.

1252091205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252091205 is a deficient number, since it is larger than the sum of its proper divisors (922210587).

1252091205 is a wasteful number, since it uses less digits than its factorization.

1252091205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51425 (or 51422 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1252091205 is about 35384.9008052870. The cubic root of 1252091205 is about 1077.8177256147.

Adding to 1252091205 its reverse (5021902521), we get a palindrome (6273993726).

The spelling of 1252091205 in words is "one billion, two hundred fifty-two million, ninety-one thousand, two hundred five".