842531520 has 112 divisors (see below), whose sum is σ = 2690530560. Its totient is φ = 223374336.

The previous prime is 842531491. The next prime is 842531531. The reversal of 842531520 is 25135248.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169389 + ... + 174291.

Almost surely, 2^842531520 is an apocalyptic number.

842531520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842531520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345265280).

842531520 is an abundant number, since it is smaller than the sum of its proper divisors (1847999040).

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

842531520 is a wasteful number, since it uses less digits than its factorization.

842531520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102 (or 5092 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 842531520 is about 29026.3935066002. The cubic root of 842531520 is about 944.4856975855.

Adding to 842531520 its reverse (25135248), we get a palindrome (867666768).

It can be divided in two parts, 842531 and 520, that added together give a triangular number (843051 = T₁₂₉₈).

The spelling of 842531520 in words is "eight hundred forty-two million, five hundred thirty-one thousand, five hundred twenty".