1222540 has 24 divisors (see below), whose sum is σ = 2801232. Its totient is φ = 444480.

The previous prime is 1222537. The next prime is 1222561. The reversal of 1222540 is 452221.

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, 2559 + ... + 2998.

It is an arithmetic number, because the mean of its divisors is an integer number (116718).

2^1222540 is an apocalyptic number.

1222540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222540 is an abundant number, since it is smaller than the sum of its proper divisors (1578692).

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

1222540 is a wasteful number, since it uses less digits than its factorization.

1222540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577 (or 5575 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1222540 is about 1105.6853078521. The cubic root of 1222540 is about 106.9270764072.

Adding to 1222540 its reverse (452221), we get a palindrome (1674761).

It can be divided in two parts, 122 and 2540, that added together give a palindrome (2662).

The spelling of 1222540 in words is "one million, two hundred twenty-two thousand, five hundred forty".