1288798 has 12 divisors (see below), whose sum is σ = 2248992. Its totient is φ = 552300.

The previous prime is 1288783. The next prime is 1288799. The reversal of 1288798 is 8978821.

It is a super-2 number, since 2×1288798² = 3322000569608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6478 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (187416).

2^1288798 is an apocalyptic number.

1288798 is a deficient number, since it is larger than the sum of its proper divisors (960194).

1288798 is a wasteful number, since it uses less digits than its factorization.

1288798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13167 (or 13160 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 1288798 is about 1135.2523948444. The cubic root of 1288798 is about 108.8249019377.

The spelling of 1288798 in words is "one million, two hundred eighty-eight thousand, seven hundred ninety-eight".