1220526 has 12 divisors (see below), whose sum is σ = 2644512. Its totient is φ = 406836.

The previous prime is 1220507. The next prime is 1220591. The reversal of 1220526 is 6250221.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67807 = 1220526 / (1 + 2 + 2 + 0 + 5 + 2 + 6).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220499 and 1220508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33886 + ... + 33921.

It is an arithmetic number, because the mean of its divisors is an integer number (220376).

2^1220526 is an apocalyptic number.

1220526 is an abundant number, since it is smaller than the sum of its proper divisors (1423986).

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

1220526 is a wasteful number, since it uses less digits than its factorization.

1220526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67815 (or 67812 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1220526 is about 1104.7741850713. The cubic root of 1220526 is about 106.8683272740.

Adding to 1220526 its reverse (6250221), we get a palindrome (7470747).

The spelling of 1220526 in words is "one million, two hundred twenty thousand, five hundred twenty-six".