742815 has 24 divisors (see below), whose sum is σ = 1364688. Its totient is φ = 372480.

The previous prime is 742801. The next prime is 742817. The reversal of 742815 is 518247.

It is not a de Polignac number, because 742815 - 2⁵ = 742783 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 742815.

It is not an unprimeable number, because it can be changed into a prime (742817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (56862).

2⁷⁴²⁸¹⁵ is an apocalyptic number.

742815 is a deficient number, since it is larger than the sum of its proper divisors (621873).

742815 is a wasteful number, since it uses less digits than its factorization.

742815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 996 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 742815 is about 861.8671591376. The cubic root of 742815 is about 90.5649645976.

The spelling of 742815 in words is "seven hundred forty-two thousand, eight hundred fifteen".