1285443375 has 16 divisors (see below), whose sum is σ = 2138978400. Its totient is φ = 685569600.

The previous prime is 1285443371. The next prime is 1285443391. The reversal of 1285443375 is 5733445821.

It is not a de Polignac number, because 1285443375 - 2² = 1285443371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285443371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1713550 + ... + 1714299.

It is an arithmetic number, because the mean of its divisors is an integer number (133686150).

Almost surely, 2^1285443375 is an apocalyptic number.

1285443375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285443375 is a deficient number, since it is larger than the sum of its proper divisors (853535025).

1285443375 is an equidigital number, since it uses as much as digits as its factorization.

1285443375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427867 (or 3427857 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 1285443375 is about 35853.0804115909. The cubic root of 1285443375 is about 1087.3039942694.

The spelling of 1285443375 in words is "one billion, two hundred eighty-five million, four hundred forty-three thousand, three hundred seventy-five".