1306769 has 4 divisors (see below), whose sum is σ = 1351860. Its totient is φ = 1261680.

The previous prime is 1306759. The next prime is 1306777. The reversal of 1306769 is 9676031.

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 976144 + 330625 = 988^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306769 - 2¹² = 1302673 is a prime.

It is a super-2 number, since 2×1306769² = 3415290438722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1306759) 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, 22502 + ... + 22559.

It is an arithmetic number, because the mean of its divisors is an integer number (337965).

2^1306769 is an apocalyptic number.

It is an amenable number.

1306769 is a deficient number, since it is larger than the sum of its proper divisors (45091).

1306769 is an equidigital number, since it uses as much as digits as its factorization.

1306769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45090.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 1306769 is about 1143.1399739315. The cubic root of 1306769 is about 109.3283871036.

The spelling of 1306769 in words is "one million, three hundred six thousand, seven hundred sixty-nine".