1222500 has 60 divisors (see below), whose sum is σ = 3586352. Its totient is φ = 324000.

The previous prime is 1222499. The next prime is 1222513. The reversal of 1222500 is 52221.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7419 + ... + 7581.

2^1222500 is an apocalyptic number.

1222500 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 1222500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1793176).

1222500 is an abundant number, since it is smaller than the sum of its proper divisors (2363852).

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

1222500 is a wasteful number, since it uses less digits than its factorization.

1222500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 173 counting only the distinct ones).

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

The square root of 1222500 is about 1105.6672193748. The cubic root of 1222500 is about 106.9259102205.

Adding to 1222500 its reverse (52221), we get a palindrome (1274721).

The spelling of 1222500 in words is "one million, two hundred twenty-two thousand, five hundred".