1212302872 has 48 divisors (see below), whose sum is σ = 2520834120. Its totient is φ = 546120960.

The previous prime is 1212302869. The next prime is 1212302873. The reversal of 1212302872 is 2782032121.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1212302872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212302873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103843 + ... + 114925.

Almost surely, 2^1212302872 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 1212302872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260417060).

1212302872 is an abundant number, since it is smaller than the sum of its proper divisors (1308531248).

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

1212302872 is a wasteful number, since it uses less digits than its factorization.

1212302872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11224 (or 11209 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1212302872 is about 34818.1399847838. The cubic root of 1212302872 is about 1066.2778264126.

Adding to 1212302872 its reverse (2782032121), we get a palindrome (3994334993).

The spelling of 1212302872 in words is "one billion, two hundred twelve million, three hundred two thousand, eight hundred seventy-two".