742855845 has 16 divisors (see below), whose sum is σ = 1220693760. Its totient is φ = 385481664.

The previous prime is 742855823. The next prime is 742855847. The reversal of 742855845 is 548558247.

It is not a de Polignac number, because 742855845 - 2⁶ = 742855781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 742855794 and 742855803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742855847) 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 15 ways as a sum of consecutive naturals, for example, 668685 + ... + 669794.

It is an arithmetic number, because the mean of its divisors is an integer number (76293360).

Almost surely, 2^742855845 is an apocalyptic number.

It is an amenable number.

742855845 is a deficient number, since it is larger than the sum of its proper divisors (477837915).

742855845 is a wasteful number, since it uses less digits than its factorization.

742855845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338524.

The product of its digits is 1792000, while the sum is 48.

The square root of 742855845 is about 27255.3819455901. The cubic root of 742855845 is about 905.6662452561. Note that the first 3 decimals are identical.

The spelling of 742855845 in words is "seven hundred forty-two million, eight hundred fifty-five thousand, eight hundred forty-five".