1313457 has 4 divisors (see below), whose sum is σ = 1751280. Its totient is φ = 875636.

The previous prime is 1313453. The next prime is 1313467. The reversal of 1313457 is 7543131.

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: 7543131 = 3 ⋅2514377.

It is a cyclic number.

It is not a de Polignac number, because 1313457 - 2² = 1313453 is a prime.

It is a D-number.

1313457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1313453) 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, 218907 + ... + 218912.

It is an arithmetic number, because the mean of its divisors is an integer number (437820).

2^1313457 is an apocalyptic number.

It is an amenable number.

1313457 is a deficient number, since it is larger than the sum of its proper divisors (437823).

1313457 is an equidigital number, since it uses as much as digits as its factorization.

1313457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437822.

The product of its digits is 1260, while the sum is 24.

The square root of 1313457 is about 1146.0615166735. The cubic root of 1313457 is about 109.5145828246.

Adding to 1313457 its reverse (7543131), we get a palindrome (8856588).

It can be divided in two parts, 1313 and 457, that added together give a triangular number (1770 = T₅₉).

The spelling of 1313457 in words is "one million, three hundred thirteen thousand, four hundred fifty-seven".