1271320 has 32 divisors (see below), whose sum is σ = 2941200. Its totient is φ = 494208.

The previous prime is 1271317. The next prime is 1271321. The reversal of 1271320 is 231721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1271294 and 1271303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 1909.

2^1271320 is an apocalyptic number.

1271320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470600).

1271320 is an abundant number, since it is smaller than the sum of its proper divisors (1669880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271320 is a wasteful number, since it uses less digits than its factorization.

1271320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1271320 is about 1127.5282701556. The cubic root of 1271320 is about 108.3307192006.

The spelling of 1271320 in words is "one million, two hundred seventy-one thousand, three hundred twenty".