821115342 has 12 divisors (see below), whose sum is σ = 1779083280. Its totient is φ = 273705108.

The previous prime is 821115329. The next prime is 821115349. The reversal of 821115342 is 243511128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821115349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22808742 + ... + 22808777.

It is an arithmetic number, because the mean of its divisors is an integer number (148256940).

Almost surely, 2^821115342 is an apocalyptic number.

821115342 is an abundant number, since it is smaller than the sum of its proper divisors (957967938).

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

821115342 is a wasteful number, since it uses less digits than its factorization.

821115342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45617527 (or 45617524 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 821115342 is about 28655.1102248796. The cubic root of 821115342 is about 936.4143396230.

The spelling of 821115342 in words is "eight hundred twenty-one million, one hundred fifteen thousand, three hundred forty-two".