1520420100 has 36 divisors (see below), whose sum is σ = 4399083024. Its totient is φ = 405445280.

The previous prime is 1520420089. The next prime is 1520420107. The reversal of 1520420100 is 10240251.

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 1520420100.

It is not an unprimeable number, because it can be changed into a prime (1520420107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2533734 + ... + 2534333.

Almost surely, 2^1520420100 is an apocalyptic number.

1520420100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520420100 is an abundant number, since it is smaller than the sum of its proper divisors (2878662924).

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

1520420100 is a wasteful number, since it uses less digits than its factorization.

1520420100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068084 (or 5068077 counting only the distinct ones).

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

The square root of 1520420100 is about 38992.5646758456. The cubic root of 1520420100 is about 1149.8853319819.

Adding to 1520420100 its reverse (10240251), we get a palindrome (1530660351).

The spelling of 1520420100 in words is "one billion, five hundred twenty million, four hundred twenty thousand, one hundred".