1285853191 has 12 divisors (see below), whose sum is σ = 1561077808. Its totient is φ = 1037325312.

The previous prime is 1285853189. The next prime is 1285853197. The reversal of 1285853191 is 1913585821.

It is not a de Polignac number, because 1285853191 - 2¹ = 1285853189 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285853197) 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 11 ways as a sum of consecutive naturals, for example, 315786 + ... + 319831.

Almost surely, 2^1285853191 is an apocalyptic number.

1285853191 is a deficient number, since it is larger than the sum of its proper divisors (275224617).

1285853191 is an equidigital number, since it uses as much as digits as its factorization.

1285853191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635658 (or 635641 counting only the distinct ones).

The product of its digits is 86400, while the sum is 43.

The square root of 1285853191 is about 35858.7951693863. The cubic root of 1285853191 is about 1087.4195308583.

It can be divided in two parts, 12858 and 53191, that added together give a square (66049 = 257²).

The spelling of 1285853191 in words is "one billion, two hundred eighty-five million, eight hundred fifty-three thousand, one hundred ninety-one".