1005120420 has 24 divisors (see below), whose sum is σ = 2814337344. Its totient is φ = 268032096.

The previous prime is 1005120377. The next prime is 1005120469. The reversal of 1005120420 is 240215001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1005120420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8375944 + ... + 8376063.

It is an arithmetic number, because the mean of its divisors is an integer number (117264056).

Almost surely, 2^1005120420 is an apocalyptic number.

1005120420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005120420 is an abundant number, since it is smaller than the sum of its proper divisors (1809216924).

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

1005120420 is a wasteful number, since it uses less digits than its factorization.

1005120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16752019 (or 16752017 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1005120420 is about 31703.6341765420. The cubic root of 1005120420 is about 1001.7039017366.

Adding to 1005120420 its reverse (240215001), we get a palindrome (1245335421).

The spelling of 1005120420 in words is "one billion, five million, one hundred twenty thousand, four hundred twenty".