819126042 has 48 divisors (see below), whose sum is σ = 1908113760. Its totient is φ = 233742432.

The previous prime is 819126037. The next prime is 819126047. The reversal of 819126042 is 240621918.

It is an interprime number because it is at equal distance from previous prime (819126037) and next prime (819126047).

It is a junction number, because it is equal to n+sod(n) for n = 819125994 and 819126012.

It is not an unprimeable number, because it can be changed into a prime (819126047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 360193 + ... + 362459.

It is an arithmetic number, because the mean of its divisors is an integer number (39752370).

Almost surely, 2^819126042 is an apocalyptic number.

819126042 is an abundant number, since it is smaller than the sum of its proper divisors (1088987718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819126042 is a wasteful number, since it uses less digits than its factorization.

819126042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 819126042 is about 28620.3780897458. The cubic root of 819126042 is about 935.6575172422.

The spelling of 819126042 in words is "eight hundred nineteen million, one hundred twenty-six thousand, forty-two".