1268641 has 4 divisors (see below), whose sum is σ = 1383984. Its totient is φ = 1153300.

The previous prime is 1268633. The next prime is 1268669. The reversal of 1268641 is 1468621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1268641 - 2³ = 1268633 is a prime.

It is a Duffinian number.

1268641 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1268621) 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 3 ways as a sum of consecutive naturals, for example, 57655 + ... + 57676.

It is an arithmetic number, because the mean of its divisors is an integer number (345996).

2^1268641 is an apocalyptic number.

1268641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1268641 is a deficient number, since it is larger than the sum of its proper divisors (115343).

1268641 is a wasteful number, since it uses less digits than its factorization.

1268641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115342.

The product of its digits is 2304, while the sum is 28.

The square root of 1268641 is about 1126.3396468206. The cubic root of 1268641 is about 108.2545720751.

The spelling of 1268641 in words is "one million, two hundred sixty-eight thousand, six hundred forty-one".