1271200015 has 8 divisors (see below), whose sum is σ = 1526884128. Its totient is φ = 1015997280.

The previous prime is 1271200003. The next prime is 1271200019. The reversal of 1271200015 is 5100021721.

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

It is not a de Polignac number, because 1271200015 - 2⁵ = 1271199983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1271199965 and 1271200001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271200019) 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 7 ways as a sum of consecutive naturals, for example, 114507 + ... + 125116.

It is an arithmetic number, because the mean of its divisors is an integer number (190860516).

Almost surely, 2^1271200015 is an apocalyptic number.

1271200015 is a deficient number, since it is larger than the sum of its proper divisors (255684113).

1271200015 is a wasteful number, since it uses less digits than its factorization.

1271200015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240689.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 1271200015 is about 35653.8920035387. The cubic root of 1271200015 is about 1083.2731107088.

Adding to 1271200015 its reverse (5100021721), we get a palindrome (6371221736).

The spelling of 1271200015 in words is "one billion, two hundred seventy-one million, two hundred thousand, fifteen".