1291473 has 24 divisors (see below), whose sum is σ = 2066688. Its totient is φ = 772992.

The previous prime is 1291471. The next prime is 1291481. The reversal of 1291473 is 3741921.

It is not a de Polignac number, because 1291473 - 2¹ = 1291471 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1291471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3336 + ... + 3702.

It is an arithmetic number, because the mean of its divisors is an integer number (86112).

2^1291473 is an apocalyptic number.

It is an amenable number.

1291473 is a deficient number, since it is larger than the sum of its proper divisors (775215).

1291473 is a wasteful number, since it uses less digits than its factorization.

1291473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 410 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1291473 is about 1136.4299362477. The cubic root of 1291473 is about 108.9001414089.

It can be divided in two parts, 1291 and 473, that added together give a square (1764 = 42²).

The spelling of 1291473 in words is "one million, two hundred ninety-one thousand, four hundred seventy-three".