1285420268 has 18 divisors (see below), whose sum is σ = 2472575868. Its totient is φ = 584281720.

The previous prime is 1285420261. The next prime is 1285420277. The reversal of 1285420268 is 8620245821.

It is not an unprimeable number, because it can be changed into a prime (1285420261) 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, 1327430 + ... + 1328397.

It is an arithmetic number, because the mean of its divisors is an integer number (137365326).

Almost surely, 2^1285420268 is an apocalyptic number.

It is an amenable number.

1285420268 is a deficient number, since it is larger than the sum of its proper divisors (1187155600).

1285420268 is a wasteful number, since it uses less digits than its factorization.

1285420268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655853 (or 2655840 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 1285420268 is about 35852.7581644704. The cubic root of 1285420268 is about 1087.2974791415.

The spelling of 1285420268 in words is "one billion, two hundred eighty-five million, four hundred twenty thousand, two hundred sixty-eight".