1235520 has 224 divisors, whose sum is σ = 5120640. Its totient is φ = 276480.

The previous prime is 1235503. The next prime is 1235539. The reversal of 1235520 is 255321.

Added to its reverse (255321) it gives a square (1490841 = 1221²).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1235493 and 1235502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95034 + ... + 95046.

It is an arithmetic number, because the mean of its divisors is an integer number (22860).

2^1235520 is an apocalyptic number.

1235520 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 1235520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2560320).

1235520 is an abundant number, since it is smaller than the sum of its proper divisors (3885120).

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

1235520 is a wasteful number, since it uses less digits than its factorization.

1235520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1235520 is about 1111.5394729833. The cubic root of 1235520 is about 107.3041684409.

Adding to 1235520 its reverse (255321), we get a square (1490841 = 1221²).

The spelling of 1235520 in words is "one million, two hundred thirty-five thousand, five hundred twenty".