842741749 has 4 divisors (see below), whose sum is σ = 843703564. Its totient is φ = 841779936.

The previous prime is 842741701. The next prime is 842741759. The reversal of 842741749 is 947147248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 428904100 + 413837649 = 20710^2 + 20343^2 .

It is a cyclic number.

It is not a de Polignac number, because 842741749 - 2⁷ = 842741621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 842741699 and 842741708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842741759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479592 + ... + 481345.

It is an arithmetic number, because the mean of its divisors is an integer number (210925891).

Almost surely, 2^842741749 is an apocalyptic number.

It is an amenable number.

842741749 is a deficient number, since it is larger than the sum of its proper divisors (961815).

842741749 is an equidigital number, since it uses as much as digits as its factorization.

842741749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961814.

The product of its digits is 451584, while the sum is 46.

The square root of 842741749 is about 29030.0146228003. The cubic root of 842741749 is about 944.5642472763.

It can be divided in two parts, 8427 and 41749, that added together give a square (50176 = 224²).

The spelling of 842741749 in words is "eight hundred forty-two million, seven hundred forty-one thousand, seven hundred forty-nine".