742798 has 16 divisors (see below), whose sum is σ = 1348704. Its totient is φ = 299520.

The previous prime is 742789. The next prime is 742801. The reversal of 742798 is 897247.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

742798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323 + ... + 1798.

It is an arithmetic number, because the mean of its divisors is an integer number (84294).

2⁷⁴²⁷⁹⁸ is an apocalyptic number.

742798 is a deficient number, since it is larger than the sum of its proper divisors (605906).

742798 is a wasteful number, since it uses less digits than its factorization.

742798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147.

The product of its digits is 28224, while the sum is 37.

The square root of 742798 is about 861.8572967725. The cubic root of 742798 is about 90.5642737050.

Subtracting 742798 from its reverse (897247), we obtain a square (154449 = 393²).

It can be divided in two parts, 742 and 798, that added together give a triangular number (1540 = T₅₅).

The spelling of 742798 in words is "seven hundred forty-two thousand, seven hundred ninety-eight".