1309115 has 4 divisors (see below), whose sum is σ = 1570944. Its totient is φ = 1047288.

The previous prime is 1309103. The next prime is 1309117. The reversal of 1309115 is 5119031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5119031 = 503 ⋅10177.

It is a cyclic number.

It is not a de Polignac number, because 1309115 - 2¹⁰ = 1308091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309117) 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, 130907 + ... + 130916.

It is an arithmetic number, because the mean of its divisors is an integer number (392736).

2^1309115 is an apocalyptic number.

1309115 is a deficient number, since it is larger than the sum of its proper divisors (261829).

1309115 is an equidigital number, since it uses as much as digits as its factorization.

1309115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261828.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1309115 is about 1144.1656348624. The cubic root of 1309115 is about 109.3937725601.

The spelling of 1309115 in words is "one million, three hundred nine thousand, one hundred fifteen".