1291673 has 2 divisors, whose sum is σ = 1291674. Its totient is φ = 1291672.

The previous prime is 1291669. The next prime is 1291691. The reversal of 1291673 is 3761921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227664 + 64009 = 1108^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1291673 - 2² = 1291669 is a prime.

It is not a weakly prime, because it can be changed into another prime (1291603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645836 + 645837.

It is an arithmetic number, because the mean of its divisors is an integer number (645837).

2^1291673 is an apocalyptic number.

It is an amenable number.

1291673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291673 is an equidigital number, since it uses as much as digits as its factorization.

1291673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 1291673 is about 1136.5179277073. The cubic root of 1291673 is about 108.9057626141.

The spelling of 1291673 in words is "one million, two hundred ninety-one thousand, six hundred seventy-three".