1313405 has 4 divisors (see below), whose sum is σ = 1576092. Its totient is φ = 1050720.

The previous prime is 1313383. The next prime is 1313423. The reversal of 1313405 is 5043131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5043131 = 431 ⋅11701.

It can be written as a sum of positive squares in 2 ways, for example, as 917764 + 395641 = 958^2 + 629^2 .

It is not a de Polignac number, because 1313405 - 2²⁰ = 264829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131336 + ... + 131345.

It is an arithmetic number, because the mean of its divisors is an integer number (394023).

2^1313405 is an apocalyptic number.

It is an amenable number.

1313405 is a deficient number, since it is larger than the sum of its proper divisors (262687).

1313405 is an equidigital number, since it uses as much as digits as its factorization.

1313405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262686.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1313405 is about 1146.0388300577. The cubic root of 1313405 is about 109.5131375715.

Adding to 1313405 its reverse (5043131), we get a palindrome (6356536).

The spelling of 1313405 in words is "one million, three hundred thirteen thousand, four hundred five".