1288243 has 12 divisors (see below), whose sum is σ = 1506168. Its totient is φ = 1088960.

The previous prime is 1288213. The next prime is 1288247. The reversal of 1288243 is 3428821.

1288243 = T₃₂ + T₃₃ + ... + T₁₉₇.

It is not a de Polignac number, because 1288243 - 2⁹ = 1287731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15480 + ... + 15562.

It is an arithmetic number, because the mean of its divisors is an integer number (125514).

2^1288243 is an apocalyptic number.

1288243 is a deficient number, since it is larger than the sum of its proper divisors (217925).

1288243 is an equidigital number, since it uses as much as digits as its factorization.

1288243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 111 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 1288243 is about 1135.0079294877. The cubic root of 1288243 is about 108.8092784673.

The spelling of 1288243 in words is "one million, two hundred eighty-eight thousand, two hundred forty-three".