1002520 has 32 divisors (see below), whose sum is σ = 2293920. Its totient is φ = 394240.

The previous prime is 1002517. The next prime is 1002523. The reversal of 1002520 is 252001.

It is an interprime number because it is at equal distance from previous prime (1002517) and next prime (1002523).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1002497 and 1002506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002523) 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, 2664 + ... + 3016.

It is an arithmetic number, because the mean of its divisors is an integer number (71685).

2^1002520 is an apocalyptic number.

1002520 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 1002520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146960).

1002520 is an abundant number, since it is smaller than the sum of its proper divisors (1291400).

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

1002520 is a wasteful number, since it uses less digits than its factorization.

1002520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1002520 is about 1001.2592071986. The cubic root of 1002520 is about 100.0839295386.

Adding to 1002520 its reverse (252001), we get a palindrome (1254521).

The spelling of 1002520 in words is "one million, two thousand, five hundred twenty".