842205512 has 8 divisors (see below), whose sum is σ = 1579135350. Its totient is φ = 421102752.

The previous prime is 842205473. The next prime is 842205521. The reversal of 842205512 is 215502248.

It can be written as a sum of positive squares in only one way, i.e., 841348036 + 857476 = 29006^2 + 926^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×842205512³ (a number of 28 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 52637837 + ... + 52637852.

Almost surely, 2^842205512 is an apocalyptic number.

It is an amenable number.

842205512 is a deficient number, since it is larger than the sum of its proper divisors (736929838).

842205512 is a wasteful number, since it uses less digits than its factorization.

842205512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105275695 (or 105275691 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 842205512 is about 29020.7772466555. Note that the first 3 decimals coincide. The cubic root of 842205512 is about 944.3638625330.

The spelling of 842205512 in words is "eight hundred forty-two million, two hundred five thousand, five hundred twelve".