1212985732 has 72 divisors (see below), whose sum is σ = 2551295040. Its totient is φ = 494164800.

The previous prime is 1212985721. The next prime is 1212985733. The reversal of 1212985732 is 2375892121.

Its product of digits (60480) is a multiple of the sum of its prime divisors (840).

It is not an unprimeable number, because it can be changed into a prime (1212985733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1641019 + ... + 1641757.

Almost surely, 2^1212985732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212985732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275647520).

1212985732 is an abundant number, since it is smaller than the sum of its proper divisors (1338309308).

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

1212985732 is a wasteful number, since it uses less digits than its factorization.

1212985732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 840 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 1212985732 is about 34827.9446996230. The cubic root of 1212985732 is about 1066.4779914115.

The spelling of 1212985732 in words is "one billion, two hundred twelve million, nine hundred eighty-five thousand, seven hundred thirty-two".