1022520 has 32 divisors (see below), whose sum is σ = 3067920. Its totient is φ = 272640.

The previous prime is 1022519. The next prime is 1022531. The reversal of 1022520 is 252201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1022496 and 1022505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4141 + ... + 4380.

2^1022520 is an apocalyptic number.

1022520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022520 is an abundant number, since it is smaller than the sum of its proper divisors (2045400).

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

1022520 is a wasteful number, since it uses less digits than its factorization.

1022520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535 (or 8531 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1022520 is about 1011.1973101230. The cubic root of 1022520 is about 100.7451011211.

Adding to 1022520 its reverse (252201), we get a palindrome (1274721).

The spelling of 1022520 in words is "one million, twenty-two thousand, five hundred twenty".