1623120 has 40 divisors (see below), whose sum is σ = 5032416. Its totient is φ = 432768.

The previous prime is 1623107. The next prime is 1623137. The reversal of 1623120 is 213261.

It is a tau number, because it is divible by the number of its divisors (40).

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 1623120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3142 + ... + 3621.

2^1623120 is an apocalyptic number.

1623120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623120 is an abundant number, since it is smaller than the sum of its proper divisors (3409296).

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

1623120 is a wasteful number, since it uses less digits than its factorization.

1623120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779 (or 6773 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1623120 is about 1274.0172683288. The cubic root of 1623120 is about 117.5213783344.

Adding to 1623120 its reverse (213261), we get a palindrome (1836381).

The spelling of 1623120 in words is "one million, six hundred twenty-three thousand, one hundred twenty".