1285800395 has 64 divisors (see below), whose sum is σ = 1881308160. Its totient is φ = 832550400.

The previous prime is 1285800377. The next prime is 1285800401. The reversal of 1285800395 is 5930085821.

It is not a de Polignac number, because 1285800395 - 2²⁴ = 1269023179 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1465697 + ... + 1466573.

It is an arithmetic number, because the mean of its divisors is an integer number (29395440).

Almost surely, 2^1285800395 is an apocalyptic number.

1285800395 is a deficient number, since it is larger than the sum of its proper divisors (595507765).

1285800395 is a wasteful number, since it uses less digits than its factorization.

1285800395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1285800395 is about 35858.0589965492. The cubic root of 1285800395 is about 1087.4046478251.

The spelling of 1285800395 in words is "one billion, two hundred eighty-five million, eight hundred thousand, three hundred ninety-five".