1222900 has 36 divisors (see below), whose sum is σ = 3034528. Its totient is φ = 419040.

The previous prime is 1222889. The next prime is 1222909. The reversal of 1222900 is 92221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174 + ... + 1573.

2^1222900 is an apocalyptic number.

1222900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222900 is an abundant number, since it is smaller than the sum of its proper divisors (1811628).

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

1222900 is a wasteful number, since it uses less digits than its factorization.

1222900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1222900 is about 1105.8480908335. The cubic root of 1222900 is about 106.9375709431.

The spelling of 1222900 in words is "one million, two hundred twenty-two thousand, nine hundred".