742128 has 20 divisors (see below), whose sum is σ = 1917288.
Its totient is φ = 247360.
The previous prime is 742127. The next prime is 742151. The reversal of 742128 is 821247.
742128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a junction number, because it is equal to n+sod(n) for n = 742098 and 742107.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (742127) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7683 + ... + 7778.
2742128 is an apocalyptic number.
It is an amenable number.
742128 is an abundant number, since it is smaller than the sum of its proper divisors (1175160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
742128 is a wasteful number, since it uses less digits than its factorization.
742128 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15472 (or 15466 counting only the distinct ones).
The product of its digits is 896, while the sum is 24.
The square root of 742128 is about 861.4685136440.
The cubic root of 742128 is about 90.5370360100.
The spelling of 742128 in words is "seven hundred forty-two thousand, one hundred twenty-eight".