1205140115 has 12 divisors (see below), whose sum is σ = 1536242736. Its totient is φ = 907398528.

The previous prime is 1205140109. The next prime is 1205140121. The reversal of 1205140115 is 5110415021.

It is an interprime number because it is at equal distance from previous prime (1205140109) and next prime (1205140121).

It is not a de Polignac number, because 1205140115 - 2⁴ = 1205140099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 415559 + ... + 418448.

It is an arithmetic number, because the mean of its divisors is an integer number (128020228).

Almost surely, 2^1205140115 is an apocalyptic number.

1205140115 is a deficient number, since it is larger than the sum of its proper divisors (331102621).

1205140115 is an equidigital number, since it uses as much as digits as its factorization.

1205140115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834046 (or 834029 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1205140115 is about 34715.1280423967. The cubic root of 1205140115 is about 1064.1736821808.

Adding to 1205140115 its reverse (5110415021), we get a palindrome (6315555136).

The spelling of 1205140115 in words is "one billion, two hundred five million, one hundred forty thousand, one hundred fifteen".