1272775 has 18 divisors (see below), whose sum is σ = 1837680. Its totient is φ = 871920.

The previous prime is 1272749. The next prime is 1272811. The reversal of 1272775 is 5772721.

It is not a de Polignac number, because 1272775 - 2⁷ = 1272647 is a prime.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 706 + ... + 1744.

2^1272775 is an apocalyptic number.

1272775 is a deficient number, since it is larger than the sum of its proper divisors (564905).

1272775 is a wasteful number, since it uses less digits than its factorization.

1272775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1051 counting only the distinct ones).

The product of its digits is 6860, while the sum is 31.

The square root of 1272775 is about 1128.1733022900. The cubic root of 1272775 is about 108.3720308827.

The spelling of 1272775 in words is "one million, two hundred seventy-two thousand, seven hundred seventy-five".