1285608825 has 36 divisors (see below), whose sum is σ = 2312904048. Its totient is φ = 682610400.

The previous prime is 1285608763. The next prime is 1285608847. The reversal of 1285608825 is 5288065821.

1285608825 is a `hidden beast` number, since 1 + 2 + 8 + 560 + 8 + 82 + 5 = 666.

It is not a de Polignac number, because 1285608825 - 2²² = 1281414521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38490 + ... + 63660.

Almost surely, 2^1285608825 is an apocalyptic number.

1285608825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285608825 is a deficient number, since it is larger than the sum of its proper divisors (1027295223).

1285608825 is a wasteful number, since it uses less digits than its factorization.

1285608825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25414 (or 25406 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The square root of 1285608825 is about 35855.3876704743. The cubic root of 1285608825 is about 1087.3506413983.

The spelling of 1285608825 in words is "one billion, two hundred eighty-five million, six hundred eight thousand, eight hundred twenty-five".