1291293 has 6 divisors (see below), whose sum is σ = 1865214. Its totient is φ = 860856.

The previous prime is 1291271. The next prime is 1291313. The reversal of 1291293 is 3921921.

It can be written as a sum of positive squares in only one way, i.e., 710649 + 580644 = 843^2 + 762^2 .

It is not a de Polignac number, because 1291293 - 2⁶ = 1291229 is a prime.

It is a super-2 number, since 2×1291293² = 3334875223698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291223) 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 5 ways as a sum of consecutive naturals, for example, 71730 + ... + 71747.

It is an arithmetic number, because the mean of its divisors is an integer number (310869).

2^1291293 is an apocalyptic number.

It is an amenable number.

1291293 is a deficient number, since it is larger than the sum of its proper divisors (573921).

1291293 is a wasteful number, since it uses less digits than its factorization.

1291293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143483 (or 143480 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1291293 is about 1136.3507381086. The cubic root of 1291293 is about 108.8950818280.

The spelling of 1291293 in words is "one million, two hundred ninety-one thousand, two hundred ninety-three".