1275668 has 6 divisors (see below), whose sum is σ = 2232426. Its totient is φ = 637832.

The previous prime is 1275667. The next prime is 1275683. The reversal of 1275668 is 8665721.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 407044 = 932^2 + 638^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275661) 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 as a sum of consecutive naturals, namely, 159455 + ... + 159462.

It is an arithmetic number, because the mean of its divisors is an integer number (372071).

2^1275668 is an apocalyptic number.

It is an amenable number.

1275668 is a deficient number, since it is larger than the sum of its proper divisors (956758).

1275668 is a wasteful number, since it uses less digits than its factorization.

1275668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318921 (or 318919 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 1275668 is about 1129.4547357021. The cubic root of 1275668 is about 108.4540781266.

The spelling of 1275668 in words is "one million, two hundred seventy-five thousand, six hundred sixty-eight".