1275663 has 8 divisors (see below), whose sum is σ = 1801008. Its totient is φ = 800384.

The previous prime is 1275661. The next prime is 1275667. The reversal of 1275663 is 3665721.

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

It is a cyclic number.

It is not a de Polignac number, because 1275663 - 2¹ = 1275661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275663.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12456 + ... + 12557.

It is an arithmetic number, because the mean of its divisors is an integer number (225126).

2^1275663 is an apocalyptic number.

1275663 is a deficient number, since it is larger than the sum of its proper divisors (525345).

1275663 is a wasteful number, since it uses less digits than its factorization.

1275663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25033.

The product of its digits is 7560, while the sum is 30.

The square root of 1275663 is about 1129.4525222425. The cubic root of 1275663 is about 108.4539364306.

The spelling of 1275663 in words is "one million, two hundred seventy-five thousand, six hundred sixty-three".