7042921056 has 96 divisors (see below), whose sum is σ = 20615666400. Its totient is φ = 2339205120.

The previous prime is 7042921051. The next prime is 7042921069. The reversal of 7042921056 is 6501292407.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 7042921056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7042921051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228280 + ... + 257288.

It is an arithmetic number, because the mean of its divisors is an integer number (214746525).

Almost surely, 2^7042921056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7042921056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10307833200).

7042921056 is an abundant number, since it is smaller than the sum of its proper divisors (13572745344).

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

7042921056 is a wasteful number, since it uses less digits than its factorization.

7042921056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29309 (or 29295 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 7042921056 is about 83922.1130334550. The cubic root of 7042921056 is about 1916.8329820375.

The spelling of 7042921056 in words is "seven billion, forty-two million, nine hundred twenty-one thousand, fifty-six".