1356128212 has 24 divisors (see below), whose sum is σ = 2399339880. Its totient is φ = 670617600.

The previous prime is 1356128209. The next prime is 1356128239. The reversal of 1356128212 is 2128216531.

It can be written as a sum of positive squares in 4 ways, for example, as 536107716 + 820020496 = 23154^2 + 28636^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716964 + ... + 718852.

It is an arithmetic number, because the mean of its divisors is an integer number (99972495).

Almost surely, 2^1356128212 is an apocalyptic number.

It is an amenable number.

1356128212 is a deficient number, since it is larger than the sum of its proper divisors (1043211668).

1356128212 is a wasteful number, since it uses less digits than its factorization.

1356128212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771 (or 3769 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 1356128212 is about 36825.6461178891. The cubic root of 1356128212 is about 1106.8792607413.

The spelling of 1356128212 in words is "one billion, three hundred fifty-six million, one hundred twenty-eight thousand, two hundred twelve".