1205136007 has 4 divisors (see below), whose sum is σ = 1205644536. Its totient is φ = 1204627480.

The previous prime is 1205135993. The next prime is 1205136011. The reversal of 1205136007 is 7006315021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205136007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205136407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250693 + ... + 255454.

It is an arithmetic number, because the mean of its divisors is an integer number (301411134).

Almost surely, 2^1205136007 is an apocalyptic number.

1205136007 is a deficient number, since it is larger than the sum of its proper divisors (508529).

1205136007 is an equidigital number, since it uses as much as digits as its factorization.

1205136007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508528.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1205136007 is about 34715.0688750577. The cubic root of 1205136007 is about 1064.1724730184.

The spelling of 1205136007 in words is "one billion, two hundred five million, one hundred thirty-six thousand, seven".