1223980 has 24 divisors (see below), whose sum is σ = 2706480. Its totient is φ = 463680.

The previous prime is 1223977. The next prime is 1223987. The reversal of 1223980 is 893221.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1223987) 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, 1231 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (112770).

2^1223980 is an apocalyptic number.

1223980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223980 is an abundant number, since it is smaller than the sum of its proper divisors (1482500).

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

1223980 is a wasteful number, since it uses less digits than its factorization.

1223980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249 (or 3247 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1223980 is about 1106.3362960691. The cubic root of 1223980 is about 106.9690421984.

The spelling of 1223980 in words is "one million, two hundred twenty-three thousand, nine hundred eighty".