1283420 has 12 divisors (see below), whose sum is σ = 2695224. Its totient is φ = 513360.

The previous prime is 1283417. The next prime is 1283437. The reversal of 1283420 is 243821.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 64171 = 1283420 / (1 + 2 + 8 + 3 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1283392 and 1283401.

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 3 ways as a sum of consecutive naturals, for example, 32066 + ... + 32105.

It is an arithmetic number, because the mean of its divisors is an integer number (224602).

2^1283420 is an apocalyptic number.

1283420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283420 is an abundant number, since it is smaller than the sum of its proper divisors (1411804).

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

1283420 is a wasteful number, since it uses less digits than its factorization.

1283420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64180 (or 64178 counting only the distinct ones).

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

The square root of 1283420 is about 1132.8812823946. The cubic root of 1283420 is about 108.6733197946.

The spelling of 1283420 in words is "one million, two hundred eighty-three thousand, four hundred twenty".