1227420 has 48 divisors (see below), whose sum is σ = 3820320. Its totient is φ = 327168.

The previous prime is 1227407. The next prime is 1227431. The reversal of 1227420 is 247221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1227393 and 1227402.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 597 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (79590).

2^1227420 is an apocalyptic number.

1227420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227420 is an abundant number, since it is smaller than the sum of its proper divisors (2592900).

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

1227420 is a wasteful number, since it uses less digits than its factorization.

1227420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2283 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1227420 is about 1107.8898862252. The cubic root of 1227420 is about 107.0691607494.

The spelling of 1227420 in words is "one million, two hundred twenty-seven thousand, four hundred twenty".