742856 has 8 divisors (see below), whose sum is σ = 1392870. Its totient is φ = 371424.

The previous prime is 742817. The next prime is 742891. The reversal of 742856 is 658247.

742856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 320356 = 650^2 + 566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

742856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46421 + ... + 46436.

2⁷⁴²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

742856 is a deficient number, since it is larger than the sum of its proper divisors (650014).

742856 is a wasteful number, since it uses less digits than its factorization.

742856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92863 (or 92859 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 742856 is about 861.8909443775. The cubic root of 742856 is about 90.5666308246.

It can be divided in two parts, 7 and 42856, that multiplied together give a palindrome (299992).

The spelling of 742856 in words is "seven hundred forty-two thousand, eight hundred fifty-six".