1705138 has 4 divisors (see below), whose sum is σ = 2557710. Its totient is φ = 852568.

The previous prime is 1705129. The next prime is 1705139. The reversal of 1705138 is 8315071.

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

It can be written as a sum of positive squares in only one way, i.e., 1646089 + 59049 = 1283^2 + 243^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1705139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426283 + ... + 426286.

2^1705138 is an apocalyptic number.

1705138 is a deficient number, since it is larger than the sum of its proper divisors (852572).

1705138 is an equidigital number, since it uses as much as digits as its factorization.

1705138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852571.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1705138 is about 1305.8093275819. The cubic root of 1705138 is about 119.4684358434.

The spelling of 1705138 in words is "one million, seven hundred five thousand, one hundred thirty-eight".