1513820 has 48 divisors (see below), whose sum is σ = 3967488. Its totient is φ = 471360.

The previous prime is 1513819. The next prime is 1513859. The reversal of 1513820 is 283151.

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 = 1513792 and 1513801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1049 + ... + 2031.

It is an arithmetic number, because the mean of its divisors is an integer number (82656).

2^1513820 is an apocalyptic number.

1513820 is a gapful number since it is divisible by the number (10) 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 1513820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1983744).

1513820 is an abundant number, since it is smaller than the sum of its proper divisors (2453668).

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

1513820 is a wasteful number, since it uses less digits than its factorization.

1513820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1513820 is about 1230.3739269019. The cubic root of 1513820 is about 114.8219045480.

Adding to 1513820 its reverse (283151), we get a palindrome (1796971).

The spelling of 1513820 in words is "one million, five hundred thirteen thousand, eight hundred twenty".