1313557 has 4 divisors (see below), whose sum is σ = 1501216. Its totient is φ = 1125900.

The previous prime is 1313467. The next prime is 1313567. The reversal of 1313557 is 7553131.

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: 7553131 = 23 ⋅328397.

It is a cyclic number.

It is not a de Polignac number, because 1313557 - 2¹¹ = 1311509 is a prime.

It is an Ulam number.

It is a Duffinian number.

1313557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313567) 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, 93819 + ... + 93832.

It is an arithmetic number, because the mean of its divisors is an integer number (375304).

2^1313557 is an apocalyptic number.

It is an amenable number.

1313557 is a deficient number, since it is larger than the sum of its proper divisors (187659).

1313557 is an equidigital number, since it uses as much as digits as its factorization.

1313557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187658.

The product of its digits is 1575, while the sum is 25.

The square root of 1313557 is about 1146.1051435187. The cubic root of 1313557 is about 109.5173620503.

Adding to 1313557 its reverse (7553131), we get a palindrome (8866688).

The spelling of 1313557 in words is "one million, three hundred thirteen thousand, five hundred fifty-seven".