1285385226 has 16 divisors (see below), whose sum is σ = 2706074400. Its totient is φ = 405911088.

The previous prime is 1285385201. The next prime is 1285385239. The reversal of 1285385226 is 6225835821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5637541 + ... + 5637768.

It is an arithmetic number, because the mean of its divisors is an integer number (169129650).

Almost surely, 2^1285385226 is an apocalyptic number.

1285385226 is an abundant number, since it is smaller than the sum of its proper divisors (1420689174).

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

1285385226 is a wasteful number, since it uses less digits than its factorization.

1285385226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11275333.

The product of its digits is 230400, while the sum is 42.

The square root of 1285385226 is about 35852.2694679151. The cubic root of 1285385226 is about 1087.2875987350.

The spelling of 1285385226 in words is "one billion, two hundred eighty-five million, three hundred eighty-five thousand, two hundred twenty-six".