1291394 has 8 divisors (see below), whose sum is σ = 2086140. Its totient is φ = 596016.

The previous prime is 1291391. The next prime is 1291421. The reversal of 1291394 is 4931921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1026169 + 265225 = 1013^2 + 515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1291391) 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, 24809 + ... + 24860.

2^1291394 is an apocalyptic number.

1291394 is a deficient number, since it is larger than the sum of its proper divisors (794746).

1291394 is a wasteful number, since it uses less digits than its factorization.

1291394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49684.

The product of its digits is 1944, while the sum is 29.

The square root of 1291394 is about 1136.3951777441. The cubic root of 1291394 is about 108.8979208730.

The spelling of 1291394 in words is "one million, two hundred ninety-one thousand, three hundred ninety-four".