1291013 has 4 divisors (see below), whose sum is σ = 1347168. Its totient is φ = 1234860.

The previous prime is 1291009. The next prime is 1291019. The reversal of 1291013 is 3101921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3101921 = 19 ⋅163259.

It is a cyclic number.

It is not a de Polignac number, because 1291013 - 2² = 1291009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1290982 and 1291000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291019) 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, 28043 + ... + 28088.

It is an arithmetic number, because the mean of its divisors is an integer number (336792).

2^1291013 is an apocalyptic number.

It is an amenable number.

1291013 is a deficient number, since it is larger than the sum of its proper divisors (56155).

1291013 is an equidigital number, since it uses as much as digits as its factorization.

1291013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56154.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1291013 is about 1136.2275300308. The cubic root of 1291013 is about 108.8872104343.

Adding to 1291013 its reverse (3101921), we get a palindrome (4392934).

The spelling of 1291013 in words is "one million, two hundred ninety-one thousand, thirteen".