1291926 has 16 divisors (see below), whose sum is σ = 2599344. Its totient is φ = 428064.

The previous prime is 1291909. The next prime is 1291931. The reversal of 1291926 is 6291921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1291893 and 1291902.

It is a congruent number.

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, 636 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (162459).

2^1291926 is an apocalyptic number.

1291926 is an abundant number, since it is smaller than the sum of its proper divisors (1307418).

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

1291926 is a wasteful number, since it uses less digits than its factorization.

1291926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295.

The product of its digits is 1944, while the sum is 30.

The square root of 1291926 is about 1136.6292271449. The cubic root of 1291926 is about 108.9128726074.

The spelling of 1291926 in words is "one million, two hundred ninety-one thousand, nine hundred twenty-six".