1271385 has 24 divisors (see below), whose sum is σ = 2321280. Its totient is φ = 641952.

The previous prime is 1271383. The next prime is 1271393. The reversal of 1271385 is 5831721.

It is not a de Polignac number, because 1271385 - 2¹ = 1271383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271383) 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 23 ways as a sum of consecutive naturals, for example, 112 + ... + 1598.

It is an arithmetic number, because the mean of its divisors is an integer number (96720).

2^1271385 is an apocalyptic number.

1271385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1271385 is a deficient number, since it is larger than the sum of its proper divisors (1049895).

1271385 is a wasteful number, since it uses less digits than its factorization.

1271385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1514 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1271385 is about 1127.5570938981. The cubic root of 1271385 is about 108.3325654120.

The spelling of 1271385 in words is "one million, two hundred seventy-one thousand, three hundred eighty-five".