1277047387 has 32 divisors (see below), whose sum is σ = 1678639104. Its totient is φ = 942429600.

The previous prime is 1277047381. The next prime is 1277047391. The reversal of 1277047387 is 7837407721.

It is not a de Polignac number, because 1277047387 - 2²⁷ = 1142829659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1277047381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106498 + ... + 117880.

It is an arithmetic number, because the mean of its divisors is an integer number (52457472).

Almost surely, 2^1277047387 is an apocalyptic number.

1277047387 is a deficient number, since it is larger than the sum of its proper divisors (401591717).

1277047387 is a wasteful number, since it uses less digits than its factorization.

1277047387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11479.

The product of its (nonzero) digits is 460992, while the sum is 46.

The square root of 1277047387 is about 35735.7997951634. The cubic root of 1277047387 is about 1084.9315471407.

The spelling of 1277047387 in words is "one billion, two hundred seventy-seven million, forty-seven thousand, three hundred eighty-seven".