1222140 has 24 divisors (see below), whose sum is σ = 3422160. Its totient is φ = 325888.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222140 is 412221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10125 + ... + 10244.

It is an arithmetic number, because the mean of its divisors is an integer number (142590).

2^1222140 is an apocalyptic number.

1222140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222140 is an abundant number, since it is smaller than the sum of its proper divisors (2200020).

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

1222140 is a wasteful number, since it uses less digits than its factorization.

1222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20381 (or 20379 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1222140 is about 1105.5044097605. The cubic root of 1222140 is about 106.9154133952.

Adding to 1222140 its reverse (412221), we get a palindrome (1634361).

The spelling of 1222140 in words is "one million, two hundred twenty-two thousand, one hundred forty".