1291126 has 16 divisors (see below), whose sum is σ = 2075760. Its totient is φ = 600480.

The previous prime is 1291117. The next prime is 1291139. The reversal of 1291126 is 6211921.

It is a junction number, because it is equal to n+sod(n) for n = 1291097 and 1291106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040 + ... + 2596.

It is an arithmetic number, because the mean of its divisors is an integer number (129735).

2^1291126 is an apocalyptic number.

1291126 is a deficient number, since it is larger than the sum of its proper divisors (784634).

1291126 is a wasteful number, since it uses less digits than its factorization.

1291126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639.

The product of its digits is 216, while the sum is 22.

The square root of 1291126 is about 1136.2772548986. The cubic root of 1291126 is about 108.8903872409.

The spelling of 1291126 in words is "one million, two hundred ninety-one thousand, one hundred twenty-six".