1268940 has 24 divisors (see below), whose sum is σ = 3553200. Its totient is φ = 338368.

The previous prime is 1268929. The next prime is 1268947. The reversal of 1268940 is 498621.

It is a super-2 number, since 2×1268940² = 3220417447200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1268898 and 1268907.

It is not an unprimeable number, because it can be changed into a prime (1268947) 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, 10515 + ... + 10634.

It is an arithmetic number, because the mean of its divisors is an integer number (148050).

2^1268940 is an apocalyptic number.

1268940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1268940 is an abundant number, since it is smaller than the sum of its proper divisors (2284260).

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

1268940 is a wasteful number, since it uses less digits than its factorization.

1268940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21161 (or 21159 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1268940 is about 1126.4723698343. The cubic root of 1268940 is about 108.2630760765.

The spelling of 1268940 in words is "one million, two hundred sixty-eight thousand, nine hundred forty".