1283290 has 16 divisors (see below), whose sum is σ = 2325960. Its totient is φ = 509760.

The previous prime is 1283237. The next prime is 1283297. The reversal of 1283290 is 923821.

It can be written as a sum of positive squares in 4 ways, for example, as 363609 + 919681 = 603^2 + 959^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1283297) 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, 1456 + ... + 2164.

2^1283290 is an apocalyptic number.

1283290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1283290 is a deficient number, since it is larger than the sum of its proper divisors (1042670).

1283290 is a wasteful number, since it uses less digits than its factorization.

1283290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1283290 is about 1132.8239051150. The cubic root of 1283290 is about 108.6696504297.

The spelling of 1283290 in words is "one million, two hundred eighty-three thousand, two hundred ninety".