1277128 has 16 divisors (see below), whose sum is σ = 2407680. Its totient is φ = 635088.

The previous prime is 1277113. The next prime is 1277137. The reversal of 1277128 is 8217721.

It is a junction number, because it is equal to n+sod(n) for n = 1277096 and 1277105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801 + ... + 2407.

It is an arithmetic number, because the mean of its divisors is an integer number (150480).

2^1277128 is an apocalyptic number.

It is an amenable number.

1277128 is a deficient number, since it is larger than the sum of its proper divisors (1130552).

1277128 is a wasteful number, since it uses less digits than its factorization.

1277128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 872 counting only the distinct ones).

The product of its digits is 1568, while the sum is 28.

The square root of 1277128 is about 1130.1008804527. The cubic root of 1277128 is about 108.4954375254.

The spelling of 1277128 in words is "one million, two hundred seventy-seven thousand, one hundred twenty-eight".