1283620 has 24 divisors (see below), whose sum is σ = 2903544. Its totient is φ = 473856.

The previous prime is 1283603. The next prime is 1283677. The reversal of 1283620 is 263821.

It can be written as a sum of positive squares in 4 ways, for example, as 11236 + 1272384 = 106^2 + 1128^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1283591 and 1283600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2209 + ... + 2728.

It is an arithmetic number, because the mean of its divisors is an integer number (120981).

2^1283620 is an apocalyptic number.

1283620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283620 is an abundant number, since it is smaller than the sum of its proper divisors (1619924).

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

1283620 is a wasteful number, since it uses less digits than its factorization.

1283620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959 (or 4957 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1283620 is about 1132.9695494584. The cubic root of 1283620 is about 108.6789644874.

The spelling of 1283620 in words is "one million, two hundred eighty-three thousand, six hundred twenty".