1306138 has 8 divisors (see below), whose sum is σ = 1964160. Its totient is φ = 651420.

The previous prime is 1306133. The next prime is 1306139. The reversal of 1306138 is 8316031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1306133) 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, 823 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (245520).

2^1306138 is an apocalyptic number.

1306138 is a deficient number, since it is larger than the sum of its proper divisors (658022).

1306138 is an equidigital number, since it uses as much as digits as its factorization.

1306138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1306138 is about 1142.8639464083. The cubic root of 1306138 is about 109.3107871250.

It can be divided in two parts, 1306 and 138, that added together give a square (1444 = 38²).

The spelling of 1306138 in words is "one million, three hundred six thousand, one hundred thirty-eight".