742656 has 36 divisors (see below), whose sum is σ = 1978592. Its totient is φ = 247296.

The previous prime is 742619. The next prime is 742657. The reversal of 742656 is 656247.

It is an Ulam number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742657) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 285 + ... + 1251.

2⁷⁴²⁶⁵⁶ 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 742656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989296).

742656 is an abundant number, since it is smaller than the sum of its proper divisors (1235936).

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

742656 is an equidigital number, since it uses as much as digits as its factorization.

742656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 972 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 742656 is about 861.7749126077. The cubic root of 742656 is about 90.5585023081.

The spelling of 742656 in words is "seven hundred forty-two thousand, six hundred fifty-six".