1233520 has 40 divisors (see below), whose sum is σ = 3039984. Its totient is φ = 463872.

The previous prime is 1233509. The next prime is 1233523. The reversal of 1233520 is 253321.

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 (16).

It is a junction number, because it is equal to n+sod(n) for n = 1233494 and 1233503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907 + ... + 1813.

2^1233520 is an apocalyptic number.

1233520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1233520 is the 907-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1233520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519992).

1233520 is an abundant number, since it is smaller than the sum of its proper divisors (1806464).

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

1233520 is a wasteful number, since it uses less digits than its factorization.

1233520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 931 counting only the distinct ones).

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

The square root of 1233520 is about 1110.6394554490. The cubic root of 1233520 is about 107.2462375723.

Adding to 1233520 its reverse (253321), we get a palindrome (1486841).

The spelling of 1233520 in words is "one million, two hundred thirty-three thousand, five hundred twenty".