1277216473 has 8 divisors (see below), whose sum is σ = 1435267008. Its totient is φ = 1127709264.

The previous prime is 1277216453. The next prime is 1277216489. The reversal of 1277216473 is 3746127721.

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 1277216473 - 2²⁹ = 740345561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1277216453) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2135515 + ... + 2136112.

It is an arithmetic number, because the mean of its divisors is an integer number (179408376).

Almost surely, 2^1277216473 is an apocalyptic number.

1277216473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1277216473 is a deficient number, since it is larger than the sum of its proper divisors (158050535).

1277216473 is a wasteful number, since it uses less digits than its factorization.

1277216473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271663.

The product of its digits is 98784, while the sum is 40.

The square root of 1277216473 is about 35738.1654957274. The cubic root of 1277216473 is about 1084.9794280681.

The spelling of 1277216473 in words is "one billion, two hundred seventy-seven million, two hundred sixteen thousand, four hundred seventy-three".