1267505 has 4 divisors (see below), whose sum is σ = 1521012. Its totient is φ = 1014000.

The previous prime is 1267501. The next prime is 1267517. The reversal of 1267505 is 5057621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 906304 + 361201 = 952^2 + 601^2 .

It is not a de Polignac number, because 1267505 - 2² = 1267501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1267501) 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 in 3 ways as a sum of consecutive naturals, for example, 126746 + ... + 126755.

It is an arithmetic number, because the mean of its divisors is an integer number (380253).

2^1267505 is an apocalyptic number.

It is an amenable number.

1267505 is a deficient number, since it is larger than the sum of its proper divisors (253507).

1267505 is an equidigital number, since it uses as much as digits as its factorization.

1267505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253506.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1267505 is about 1125.8352454955. The cubic root of 1267505 is about 108.2222503706. Note that the first 4 decimals are identical.

The spelling of 1267505 in words is "one million, two hundred sixty-seven thousand, five hundred five".