1291263 has 8 divisors (see below), whose sum is σ = 1768368. Its totient is φ = 837504.

The previous prime is 1291249. The next prime is 1291271. The reversal of 1291263 is 3621921.

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

It is not a de Polignac number, because 1291263 - 2⁸ = 1291007 is a prime.

1291263 is a lucky number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5706 + ... + 5927.

It is an arithmetic number, because the mean of its divisors is an integer number (221046).

2^1291263 is an apocalyptic number.

1291263 is a deficient number, since it is larger than the sum of its proper divisors (477105).

1291263 is a wasteful number, since it uses less digits than its factorization.

1291263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11673.

The product of its digits is 648, while the sum is 24.

The square root of 1291263 is about 1136.3375378821. The cubic root of 1291263 is about 108.8942385189.

The spelling of 1291263 in words is "one million, two hundred ninety-one thousand, two hundred sixty-three".