1288926 has 16 divisors (see below), whose sum is σ = 2864400. Its totient is φ = 429624.

The previous prime is 1288921. The next prime is 1288933. The reversal of 1288926 is 6298821.

It is a super-2 number, since 2×1288926² = 3322660466952, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11881 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (179025).

2^1288926 is an apocalyptic number.

1288926 is an abundant number, since it is smaller than the sum of its proper divisors (1575474).

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

1288926 is a wasteful number, since it uses less digits than its factorization.

1288926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23880 (or 23874 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 1288926 is about 1135.3087685736. The cubic root of 1288926 is about 108.8285045520.

The spelling of 1288926 in words is "one million, two hundred eighty-eight thousand, nine hundred twenty-six".