1224380 has 24 divisors (see below), whose sum is σ = 2661120. Its totient is φ = 472640.

The previous prime is 1224347. The next prime is 1224389. The reversal of 1224380 is 834221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224389) 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, 476 + ... + 1635.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^1224380 is an apocalyptic number.

1224380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224380 is an abundant number, since it is smaller than the sum of its proper divisors (1436740).

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

1224380 is a wasteful number, since it uses less digits than its factorization.

1224380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1224380 is about 1106.5170581604. The cubic root of 1224380 is about 106.9806935208.

The spelling of 1224380 in words is "one million, two hundred twenty-four thousand, three hundred eighty".