1227980 has 24 divisors (see below), whose sum is σ = 2777712. Its totient is φ = 453312.

The previous prime is 1227979. The next prime is 1227983. The reversal of 1227980 is 897221.

It is a happy number.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1227983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2102 + ... + 2621.

It is an arithmetic number, because the mean of its divisors is an integer number (115738).

2^1227980 is an apocalyptic number.

1227980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227980 is an abundant number, since it is smaller than the sum of its proper divisors (1549732).

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

1227980 is a wasteful number, since it uses less digits than its factorization.

1227980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745 (or 4743 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1227980 is about 1108.1425901029. The cubic root of 1227980 is about 107.0854414069.

The spelling of 1227980 in words is "one million, two hundred twenty-seven thousand, nine hundred eighty".