1201971984 has 40 divisors (see below), whose sum is σ = 3171166080. Its totient is φ = 392131968.

The previous prime is 1201971941. The next prime is 1201971989. The reversal of 1201971984 is 4891791021.

It is not an unprimeable number, because it can be changed into a prime (1201971989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264139 + ... + 268650.

It is an arithmetic number, because the mean of its divisors is an integer number (79279152).

Almost surely, 2^1201971984 is an apocalyptic number.

It is an amenable number.

1201971984 is an abundant number, since it is smaller than the sum of its proper divisors (1969194096).

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

1201971984 is a wasteful number, since it uses less digits than its factorization.

1201971984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532847 (or 532841 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1201971984 is about 34669.4676047960. The cubic root of 1201971984 is about 1063.2403466434.

The spelling of 1201971984 in words is "one billion, two hundred one million, nine hundred seventy-one thousand, nine hundred eighty-four".