1211488256 has 48 divisors (see below), whose sum is σ = 2642650920. Its totient is φ = 550666240.

The previous prime is 1211488247. The next prime is 1211488273. The reversal of 1211488256 is 6528841121.

It is a congruent number.

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, 4361 + ... + 49416.

Almost surely, 2^1211488256 is an apocalyptic number.

1211488256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1211488256 is an abundant number, since it is smaller than the sum of its proper divisors (1431162664).

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

1211488256 is an equidigital number, since it uses as much as digits as its factorization.

1211488256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53810 (or 53790 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 1211488256 is about 34806.4398639102. The cubic root of 1211488256 is about 1066.0389417724.

The spelling of 1211488256 in words is "one billion, two hundred eleven million, four hundred eighty-eight thousand, two hundred fifty-six".