1268642 has 8 divisors (see below), whose sum is σ = 2014956. Its totient is φ = 596992.

The previous prime is 1268633. The next prime is 1268669. The reversal of 1268642 is 2468621.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 290521 = 989^2 + 539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a plaindrome in base 13.

It is an unprimeable number.

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, 18623 + ... + 18690.

2^1268642 is an apocalyptic number.

1268642 is a deficient number, since it is larger than the sum of its proper divisors (746314).

1268642 is a wasteful number, since it uses less digits than its factorization.

1268642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37332.

The product of its digits is 4608, while the sum is 29.

The square root of 1268642 is about 1126.3400907364. The cubic root of 1268642 is about 108.2546005188.

The spelling of 1268642 in words is "one million, two hundred sixty-eight thousand, six hundred forty-two".