1313506 has 4 divisors (see below), whose sum is σ = 1970262. Its totient is φ = 656752.

The previous prime is 1313467. The next prime is 1313567. The reversal of 1313506 is 6053131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6053131 = 7 ⋅864733.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 25281 = 1135^2 + 159^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328375 + ... + 328378.

2^1313506 is an apocalyptic number.

1313506 is a deficient number, since it is larger than the sum of its proper divisors (656756).

1313506 is an equidigital number, since it uses as much as digits as its factorization.

1313506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656755.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1313506 is about 1146.0828940352. The cubic root of 1313506 is about 109.5159446628.

Adding to 1313506 its reverse (6053131), we get a palindrome (7366637).

The spelling of 1313506 in words is "one million, three hundred thirteen thousand, five hundred six".