1523320 has 16 divisors (see below), whose sum is σ = 3427560. Its totient is φ = 609312.

The previous prime is 1523311. The next prime is 1523323. The reversal of 1523320 is 233251.

It is a junction number, because it is equal to n+sod(n) for n = 1523294 and 1523303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19002 + ... + 19081.

2^1523320 is an apocalyptic number.

1523320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1523320 is an abundant number, since it is smaller than the sum of its proper divisors (1904240).

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

1523320 is a wasteful number, since it uses less digits than its factorization.

1523320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38094 (or 38090 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 1523320 is about 1234.2285039651. The cubic root of 1523320 is about 115.0615927146.

Adding to 1523320 its reverse (233251), we get a palindrome (1756571).

The spelling of 1523320 in words is "one million, five hundred twenty-three thousand, three hundred twenty".