1283520 has 112 divisors (see below), whose sum is σ = 4681728. Its totient is φ = 291840.

The previous prime is 1283509. The next prime is 1283521. The reversal of 1283520 is 253821.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6625 + ... + 6815.

2^1283520 is an apocalyptic number.

1283520 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 1283520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340864).

1283520 is an abundant number, since it is smaller than the sum of its proper divisors (3398208).

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

1283520 is a wasteful number, since it uses less digits than its factorization.

1283520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1283520 is about 1132.9254167861. The cubic root of 1283520 is about 108.6761422143.

The spelling of 1283520 in words is "one million, two hundred eighty-three thousand, five hundred twenty".