1271505 has 32 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 628992.

The previous prime is 1271503. The next prime is 1271507. The reversal of 1271505 is 5051721.

It is an interprime number because it is at equal distance from previous prime (1271503) and next prime (1271507).

It is not a de Polignac number, because 1271505 - 2¹ = 1271503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271503) 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 31 ways as a sum of consecutive naturals, for example, 16056 + ... + 16134.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2^1271505 is an apocalyptic number.

1271505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1271505 is a deficient number, since it is larger than the sum of its proper divisors (917295).

1271505 is a wasteful number, since it uses less digits than its factorization.

1271505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 1271505 is about 1127.6103050256. The cubic root of 1271505 is about 108.3359736372.

It can be divided in two parts, 12 and 71505, that added together give a palindrome (71517).

The spelling of 1271505 in words is "one million, two hundred seventy-one thousand, five hundred five".