1272340855 has 8 divisors (see below), whose sum is σ = 1527804000. Its totient is φ = 1017209376.

The previous prime is 1272340829. The next prime is 1272340859. The reversal of 1272340855 is 5580432721.

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

It is a cyclic number.

It is not a de Polignac number, because 1272340855 - 2⁹ = 1272340343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272340859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74395 + ... + 89884.

It is an arithmetic number, because the mean of its divisors is an integer number (190975500).

Almost surely, 2^1272340855 is an apocalyptic number.

1272340855 is a deficient number, since it is larger than the sum of its proper divisors (255463145).

1272340855 is a wasteful number, since it uses less digits than its factorization.

1272340855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165833.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1272340855 is about 35669.8872299871. The cubic root of 1272340855 is about 1083.5970754043.

The spelling of 1272340855 in words is "one billion, two hundred seventy-two million, three hundred forty thousand, eight hundred fifty-five".