1271916 has 24 divisors (see below), whose sum is σ = 3297840. Its totient is φ = 423936.

The previous prime is 1271903. The next prime is 1271927. The reversal of 1271916 is 6191721.

It is a super-2 number, since 2×1271916² = 3235540622112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1271916.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5781 + ... + 5996.

It is an arithmetic number, because the mean of its divisors is an integer number (137410).

2^1271916 is an apocalyptic number.

It is an amenable number.

1271916 is an abundant number, since it is smaller than the sum of its proper divisors (2025924).

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

1271916 is a wasteful number, since it uses less digits than its factorization.

1271916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11790 (or 11782 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 1271916 is about 1127.7925341125. The cubic root of 1271916 is about 108.3476451835.

It can be divided in two parts, 1271 and 916, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1271916 in words is "one million, two hundred seventy-one thousand, nine hundred sixteen".