1285832412 has 18 divisors (see below), whose sum is σ = 3250298688. Its totient is φ = 428610792.

The previous prime is 1285832407. The next prime is 1285832413. The reversal of 1285832412 is 2142385821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 35717567 = 1285832412 / (1 + 2 + 8 + 5 + 8 + 3 + 2 + 4 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285832413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17858748 + ... + 17858819.

Almost surely, 2^1285832412 is an apocalyptic number.

1285832412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285832412 is an abundant number, since it is smaller than the sum of its proper divisors (1964466276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285832412 is a wasteful number, since it uses less digits than its factorization.

1285832412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35717577 (or 35717572 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1285832412 is about 35858.5054345549. The cubic root of 1285832412 is about 1087.4136733695.

The spelling of 1285832412 in words is "one billion, two hundred eighty-five million, eight hundred thirty-two thousand, four hundred twelve".