1277208215 has 64 divisors (see below), whose sum is σ = 1788272640. Its totient is φ = 869253120.

The previous prime is 1277208209. The next prime is 1277208259. The reversal of 1277208215 is 5128027721.

It is not a de Polignac number, because 1277208215 - 2¹⁶ = 1277142679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4856174 + ... + 4856436.

It is an arithmetic number, because the mean of its divisors is an integer number (27941760).

Almost surely, 2^1277208215 is an apocalyptic number.

1277208215 is a deficient number, since it is larger than the sum of its proper divisors (511064425).

1277208215 is a wasteful number, since it uses less digits than its factorization.

1277208215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 1277208215 is about 35738.0499607911. The cubic root of 1277208215 is about 1084.9770897072.

The spelling of 1277208215 in words is "one billion, two hundred seventy-seven million, two hundred eight thousand, two hundred fifteen".