1338745 has 4 divisors (see below), whose sum is σ = 1606500. Its totient is φ = 1070992.

The previous prime is 1338737. The next prime is 1338749. The reversal of 1338745 is 5478331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5478331 = 37 ⋅148063.

It can be written as a sum of positive squares in 2 ways, for example, as 281961 + 1056784 = 531^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338745 - 2³ = 1338737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1338749) 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, 133870 + ... + 133879.

It is an arithmetic number, because the mean of its divisors is an integer number (401625).

2^1338745 is an apocalyptic number.

It is an amenable number.

1338745 is a deficient number, since it is larger than the sum of its proper divisors (267755).

1338745 is an equidigital number, since it uses as much as digits as its factorization.

1338745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267754.

The product of its digits is 10080, while the sum is 31.

The square root of 1338745 is about 1157.0414858595. The cubic root of 1338745 is about 110.2129483700.

The spelling of 1338745 in words is "one million, three hundred thirty-eight thousand, seven hundred forty-five".