1283780 has 12 divisors (see below), whose sum is σ = 2695980. Its totient is φ = 513504.

The previous prime is 1283771. The next prime is 1283797. The reversal of 1283780 is 873821.

It can be written as a sum of positive squares in 2 ways, for example, as 669124 + 614656 = 818^2 + 784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32075 + ... + 32114.

It is an arithmetic number, because the mean of its divisors is an integer number (224665).

2^1283780 is an apocalyptic number.

1283780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283780 is an abundant number, since it is smaller than the sum of its proper divisors (1412200).

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

1283780 is a wasteful number, since it uses less digits than its factorization.

1283780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64198 (or 64196 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1283780 is about 1133.0401581586. The cubic root of 1283780 is about 108.6834798195.

The spelling of 1283780 in words is "one million, two hundred eighty-three thousand, seven hundred eighty".