1201022992 has 20 divisors (see below), whose sum is σ = 2505981100. Its totient is φ = 554318208.

The previous prime is 1201022969. The next prime is 1201023011. The reversal of 1201022992 is 2992201021.

It can be written as a sum of positive squares in 2 ways, for example, as 266864896 + 934158096 = 16336^2 + 30564^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1201022992.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2886867 + ... + 2887282.

It is an arithmetic number, because the mean of its divisors is an integer number (125299055).

Almost surely, 2^1201022992 is an apocalyptic number.

It is an amenable number.

1201022992 is an abundant number, since it is smaller than the sum of its proper divisors (1304958108).

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

1201022992 is a wasteful number, since it uses less digits than its factorization.

1201022992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774170 (or 5774164 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1201022992 is about 34655.7786234850. The cubic root of 1201022992 is about 1062.9604531961.

The spelling of 1201022992 in words is "one billion, two hundred one million, twenty-two thousand, nine hundred ninety-two".