821070126 has 48 divisors (see below), whose sum is σ = 1835300688. Its totient is φ = 265161600.

The previous prime is 821070121. The next prime is 821070139. The reversal of 821070126 is 621070128.

It is a self number, because there is not a number n which added to its sum of digits gives 821070126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821070121) 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, 67986 + ... + 79146.

It is an arithmetic number, because the mean of its divisors is an integer number (38235431).

Almost surely, 2^821070126 is an apocalyptic number.

821070126 is an abundant number, since it is smaller than the sum of its proper divisors (1014230562).

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

821070126 is a wasteful number, since it uses less digits than its factorization.

821070126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11297 (or 11294 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 821070126 is about 28654.3212447966. The cubic root of 821070126 is about 936.3971509343.

The spelling of 821070126 in words is "eight hundred twenty-one million, seventy thousand, one hundred twenty-six".