1271140 has 24 divisors (see below), whose sum is σ = 2875320. Its totient is φ = 469248.

The previous prime is 1271129. The next prime is 1271147. The reversal of 1271140 is 411721.

It can be written as a sum of positive squares in 4 ways, for example, as 65536 + 1205604 = 256^2 + 1098^2 .

It is not an unprimeable number, because it can be changed into a prime (1271147) 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, 2185 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (119805).

2^1271140 is an apocalyptic number.

1271140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271140 is an abundant number, since it is smaller than the sum of its proper divisors (1604180).

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

1271140 is a wasteful number, since it uses less digits than its factorization.

1271140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911 (or 4909 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1271140 is about 1127.4484467150. The cubic root of 1271140 is about 108.3256062865.

Adding to 1271140 its reverse (411721), we get a palindrome (1682861).

The spelling of 1271140 in words is "one million, two hundred seventy-one thousand, one hundred forty".