1285888197 has 16 divisors (see below), whose sum is σ = 1876373568. Its totient is φ = 776830080.

The previous prime is 1285888189. The next prime is 1285888199. The reversal of 1285888197 is 7918885821.

It is not a de Polignac number, because 1285888197 - 2³ = 1285888189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285888199) 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 15 ways as a sum of consecutive naturals, for example, 51918 + ... + 72575.

It is an arithmetic number, because the mean of its divisors is an integer number (117273348).

Almost surely, 2^1285888197 is an apocalyptic number.

It is an amenable number.

1285888197 is a deficient number, since it is larger than the sum of its proper divisors (590485371).

1285888197 is a wasteful number, since it uses less digits than its factorization.

1285888197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124820.

The product of its digits is 2580480, while the sum is 57.

The square root of 1285888197 is about 35859.2832750461. The cubic root of 1285888197 is about 1087.4293987196.

The spelling of 1285888197 in words is "one billion, two hundred eighty-five million, eight hundred eighty-eight thousand, one hundred ninety-seven".