1223140 has 24 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 467808.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223140 is 413221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223140.

It is not an unprimeable number, because it can be changed into a prime (1223149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870 + ... + 1789.

It is an arithmetic number, because the mean of its divisors is an integer number (111720).

2^1223140 is an apocalyptic number.

1223140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223140 is an abundant number, since it is smaller than the sum of its proper divisors (1458140).

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

1223140 is a wasteful number, since it uses less digits than its factorization.

1223140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1223140 is about 1105.9565995101. The cubic root of 1223140 is about 106.9445661562.

Adding to 1223140 its reverse (413221), we get a palindrome (1636361).

The spelling of 1223140 in words is "one million, two hundred twenty-three thousand, one hundred forty".