1211852656 has 20 divisors (see below), whose sum is σ = 2683388272. Its totient is φ = 519365376.

The previous prime is 1211852627. The next prime is 1211852659. The reversal of 1211852656 is 6562581121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211852659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5409945 + ... + 5410168.

Almost surely, 2^1211852656 is an apocalyptic number.

1211852656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1211852656 is an abundant number, since it is smaller than the sum of its proper divisors (1471535616).

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

1211852656 is a wasteful number, since it uses less digits than its factorization.

1211852656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10820128 (or 10820122 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 1211852656 is about 34811.6741338304. The cubic root of 1211852656 is about 1066.1458146336.

The spelling of 1211852656 in words is "one billion, two hundred eleven million, eight hundred fifty-two thousand, six hundred fifty-six".