1271172 has 48 divisors (see below), whose sum is σ = 3489920. Its totient is φ = 352512.

The previous prime is 1271167. The next prime is 1271173. The reversal of 1271172 is 2711721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1271173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2904 + ... + 3312.

2^1271172 is an apocalyptic number.

1271172 is a gapful number since it is divisible by the number (12) 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 1271172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1744960).

1271172 is an abundant number, since it is smaller than the sum of its proper divisors (2218748).

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

1271172 is a wasteful number, since it uses less digits than its factorization.

1271172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 458 counting only the distinct ones).

The product of its digits is 196, while the sum is 21.

The square root of 1271172 is about 1127.4626379619. The cubic root of 1271172 is about 108.3265152843.

Adding to 1271172 its reverse (2711721), we get a palindrome (3982893).

The spelling of 1271172 in words is "one million, two hundred seventy-one thousand, one hundred seventy-two".