1520020 has 12 divisors (see below), whose sum is σ = 3192084. Its totient is φ = 608000.

The previous prime is 1520011. The next prime is 1520069. The reversal of 1520020 is 200251.

It can be written as a sum of positive squares in 2 ways, for example, as 824464 + 695556 = 908^2 + 834^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1519979 and 1520006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37981 + ... + 38020.

It is an arithmetic number, because the mean of its divisors is an integer number (266007).

2^1520020 is an apocalyptic number.

1520020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520020 is an abundant number, since it is smaller than the sum of its proper divisors (1672064).

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

1520020 is a wasteful number, since it uses less digits than its factorization.

1520020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76010 (or 76008 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1520020 is about 1232.8909116382. The cubic root of 1520020 is about 114.9784458659.

Adding to 1520020 its reverse (200251), we get a palindrome (1720271).

The spelling of 1520020 in words is "one million, five hundred twenty thousand, twenty".