1209551872 has 22 divisors (see below), whose sum is σ = 2417924588. Its totient is φ = 604775424.

The previous prime is 1209551851. The next prime is 1209551891. The reversal of 1209551872 is 2781559021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589578 + ... + 591625.

Almost surely, 2^1209551872 is an apocalyptic number.

It is an amenable number.

1209551872 is a deficient number, since it is larger than the sum of its proper divisors (1208372716).

1209551872 is an equidigital number, since it uses as much as digits as its factorization.

1209551872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181223 (or 1181205 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 1209551872 is about 34778.6122782379. The cubic root of 1209551872 is about 1065.4706706061.

The spelling of 1209551872 in words is "one billion, two hundred nine million, five hundred fifty-one thousand, eight hundred seventy-two".