1226891012 has 12 divisors (see below), whose sum is σ = 2155615056. Its totient is φ = 611001000.

The previous prime is 1226890979. The next prime is 1226891041. The reversal of 1226891012 is 2101986221.

It is a self number, because there is not a number n which added to its sum of digits gives 1226891012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609998 + ... + 612005.

It is an arithmetic number, because the mean of its divisors is an integer number (179634588).

Almost surely, 2^1226891012 is an apocalyptic number.

It is an amenable number.

1226891012 is a deficient number, since it is larger than the sum of its proper divisors (928724044).

1226891012 is a wasteful number, since it uses less digits than its factorization.

1226891012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222258 (or 1222256 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1226891012 is about 35027.0040397405. The cubic root of 1226891012 is about 1070.5377714265.

The spelling of 1226891012 in words is "one billion, two hundred twenty-six million, eight hundred ninety-one thousand, twelve".