842121044 has 12 divisors (see below), whose sum is σ = 1560400884. Its totient is φ = 396292224.

The previous prime is 842121013. The next prime is 842121089. The reversal of 842121044 is 440121248.

It can be written as a sum of positive squares in 2 ways, for example, as 504002500 + 338118544 = 22450^2 + 18388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6191999 + ... + 6192134.

It is an arithmetic number, because the mean of its divisors is an integer number (130033407).

Almost surely, 2^842121044 is an apocalyptic number.

It is an amenable number.

842121044 is a deficient number, since it is larger than the sum of its proper divisors (718279840).

842121044 is a wasteful number, since it uses less digits than its factorization.

842121044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12384154 (or 12384152 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 842121044 is about 29019.3219079978. The cubic root of 842121044 is about 944.3322901940.

The spelling of 842121044 in words is "eight hundred forty-two million, one hundred twenty-one thousand, forty-four".