1317445 has 4 divisors (see below), whose sum is σ = 1580940. Its totient is φ = 1053952.

The previous prime is 1317443. The next prime is 1317451. The reversal of 1317445 is 5447131.

1317445 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 842724 + 474721 = 918^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317445 - 2¹ = 1317443 is a prime.

It is a super-2 number, since 2×1317445² = 3471322656050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317443) 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, 131740 + ... + 131749.

It is an arithmetic number, because the mean of its divisors is an integer number (395235).

2^1317445 is an apocalyptic number.

It is an amenable number.

1317445 is a deficient number, since it is larger than the sum of its proper divisors (263495).

1317445 is an equidigital number, since it uses as much as digits as its factorization.

1317445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263494.

The product of its digits is 1680, while the sum is 25.

The square root of 1317445 is about 1147.8000696986. The cubic root of 1317445 is about 109.6253091692.

The spelling of 1317445 in words is "one million, three hundred seventeen thousand, four hundred forty-five".