1291168 has 24 divisors (see below), whose sum is σ = 2568132. Its totient is φ = 638976.

The previous prime is 1291163. The next prime is 1291177. The reversal of 1291168 is 8611921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1227664 + 63504 = 1108^2 + 252^2 .

It is a super-2 number, since 2×1291168² = 3334229608448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1291163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4896 + ... + 5152.

2^1291168 is an apocalyptic number.

It is an amenable number.

1291168 is a deficient number, since it is larger than the sum of its proper divisors (1276964).

1291168 is a wasteful number, since it uses less digits than its factorization.

1291168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 416 counting only the distinct ones).

The product of its digits is 864, while the sum is 28.

The square root of 1291168 is about 1136.2957361532. The cubic root of 1291168 is about 108.8915679536.

The spelling of 1291168 in words is "one million, two hundred ninety-one thousand, one hundred sixty-eight".