1313245 has 4 divisors (see below), whose sum is σ = 1575900. Its totient is φ = 1050592.

The previous prime is 1313239. The next prime is 1313293. The reversal of 1313245 is 5423131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5423131 = 7 ⋅774733.

It can be written as a sum of positive squares in 2 ways, for example, as 715716 + 597529 = 846^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313245 - 2³ = 1313237 is a prime.

It is a super-2 number, since 2×1313245² = 3449224860050, which contains 22 as substring.

1313245 is a lucky 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, 131320 + ... + 131329.

It is an arithmetic number, because the mean of its divisors is an integer number (393975).

2^1313245 is an apocalyptic number.

It is an amenable number.

1313245 is a deficient number, since it is larger than the sum of its proper divisors (262655).

1313245 is an equidigital number, since it uses as much as digits as its factorization.

1313245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262654.

The product of its digits is 360, while the sum is 19.

The square root of 1313245 is about 1145.9690222689. The cubic root of 1313245 is about 109.5086903996.

Adding to 1313245 its reverse (5423131), we get a palindrome (6736376).

The spelling of 1313245 in words is "one million, three hundred thirteen thousand, two hundred forty-five".