742921056 has 72 divisors (see below), whose sum is σ = 2139490080. Its totient is φ = 244498176.

The previous prime is 742921051. The next prime is 742921061. The reversal of 742921056 is 650129247.

It is an interprime number because it is at equal distance from previous prime (742921051) and next prime (742921061).

It is a tau number, because it is divible by the number of its divisors (72).

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 742921056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742921051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6426 + ... + 39078.

It is an arithmetic number, because the mean of its divisors is an integer number (29715140).

Almost surely, 2^742921056 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 742921056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069745040).

742921056 is an abundant number, since it is smaller than the sum of its proper divisors (1396569024).

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

742921056 is a wasteful number, since it uses less digits than its factorization.

742921056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32748 (or 32737 counting only the distinct ones).

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

The square root of 742921056 is about 27256.5782151759. The cubic root of 742921056 is about 905.6927455405.

The spelling of 742921056 in words is "seven hundred forty-two million, nine hundred twenty-one thousand, fifty-six".