1282212009 has 24 divisors (see below), whose sum is σ = 2027260872. Its totient is φ = 776113920.

The previous prime is 1282212007. The next prime is 1282212037. The reversal of 1282212009 is 9002122821.

It can be written as a sum of positive squares in 4 ways, for example, as 23736384 + 1258475625 = 4872^2 + 35475^2 .

It is not a de Polignac number, because 1282212009 - 2¹ = 1282212007 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1282212007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82692 + ... + 96965.

It is an arithmetic number, because the mean of its divisors is an integer number (84469203).

Almost surely, 2^1282212009 is an apocalyptic number.

It is an amenable number.

1282212009 is a deficient number, since it is larger than the sum of its proper divisors (745048863).

1282212009 is a wasteful number, since it uses less digits than its factorization.

1282212009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179737 (or 179734 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1282212009 is about 35807.9880613251. The cubic root of 1282212009 is about 1086.3921363009.

The spelling of 1282212009 in words is "one billion, two hundred eighty-two million, two hundred twelve thousand, nine".