1285125285 has 32 divisors (see below), whose sum is σ = 2252240640. Its totient is φ = 622834688.

The previous prime is 1285125269. The next prime is 1285125293. The reversal of 1285125285 is 5825215821.

It is a cyclic number.

It is not a de Polignac number, because 1285125285 - 2⁴ = 1285125269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79497 + ... + 94286.

It is an arithmetic number, because the mean of its divisors is an integer number (70382520).

Almost surely, 2^1285125285 is an apocalyptic number.

1285125285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285125285 is a deficient number, since it is larger than the sum of its proper divisors (967115355).

1285125285 is a wasteful number, since it uses less digits than its factorization.

1285125285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173837.

The product of its digits is 64000, while the sum is 39.

The square root of 1285125285 is about 35848.6441166190. The cubic root of 1285125285 is about 1087.2143004287.

The spelling of 1285125285 in words is "one billion, two hundred eighty-five million, one hundred twenty-five thousand, two hundred eighty-five".