1305706 has 4 divisors (see below), whose sum is σ = 1958562. Its totient is φ = 652852.

The previous prime is 1305701. The next prime is 1305709. The reversal of 1305706 is 6075031.

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., 1221025 + 84681 = 1105^2 + 291^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1305701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326425 + ... + 326428.

2^1305706 is an apocalyptic number.

1305706 is a deficient number, since it is larger than the sum of its proper divisors (652856).

1305706 is an equidigital number, since it uses as much as digits as its factorization.

1305706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652855.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 1305706 is about 1142.6749319032. The cubic root of 1305706 is about 109.2987344253.

The spelling of 1305706 in words is "one million, three hundred five thousand, seven hundred six".