1222520 has 32 divisors (see below), whose sum is σ = 2963520. Its totient is φ = 451200.

The previous prime is 1222513. The next prime is 1222523. The reversal of 1222520 is 252221.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1222495 and 1222504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222523) by changing a digit.

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, 656 + ... + 1695.

It is an arithmetic number, because the mean of its divisors is an integer number (92610).

2^1222520 is an apocalyptic number.

1222520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222520 is an abundant number, since it is smaller than the sum of its proper divisors (1741000).

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

1222520 is a wasteful number, since it uses less digits than its factorization.

1222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 2371 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1222520 is about 1105.6762636504. The cubic root of 1222520 is about 106.9264933170.

Adding to 1222520 its reverse (252221), we get a palindrome (1474741).

Subtracting from 1222520 its reverse (252221), we obtain a cube (970299 = 99³).

The spelling of 1222520 in words is "one million, two hundred twenty-two thousand, five hundred twenty".