1042105520 has 20 divisors (see below), whose sum is σ = 2422895520. Its totient is φ = 416842176.

The previous prime is 1042105507. The next prime is 1042105523. The reversal of 1042105520 is 255012401.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1042105492 and 1042105501.

It is not an unprimeable number, because it can be changed into a prime (1042105523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6513080 + ... + 6513239.

It is an arithmetic number, because the mean of its divisors is an integer number (121144776).

Almost surely, 2^1042105520 is an apocalyptic number.

1042105520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1042105520 is an abundant number, since it is smaller than the sum of its proper divisors (1380790000).

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

1042105520 is a wasteful number, since it uses less digits than its factorization.

1042105520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13026332 (or 13026326 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1042105520 is about 32281.6591890813. The cubic root of 1042105520 is about 1013.8426696550.

Adding to 1042105520 its reverse (255012401), we get a palindrome (1297117921).

The spelling of 1042105520 in words is "one billion, forty-two million, one hundred five thousand, five hundred twenty".