1275647 has 4 divisors (see below), whose sum is σ = 1288896. Its totient is φ = 1262400.

The previous prime is 1275643. The next prime is 1275661. The reversal of 1275647 is 7465721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1275647 - 2² = 1275643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6479 + ... + 6672.

It is an arithmetic number, because the mean of its divisors is an integer number (322224).

2^1275647 is an apocalyptic number.

1275647 is a deficient number, since it is larger than the sum of its proper divisors (13249).

1275647 is an equidigital number, since it uses as much as digits as its factorization.

1275647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13248.

The product of its digits is 11760, while the sum is 32.

The square root of 1275647 is about 1129.4454391426. The cubic root of 1275647 is about 108.4534830009.

The spelling of 1275647 in words is "one million, two hundred seventy-five thousand, six hundred forty-seven".