1307128 has 16 divisors (see below), whose sum is σ = 2475000. Its totient is φ = 647136.

The previous prime is 1307123. The next prime is 1307153. The reversal of 1307128 is 8217031.

It is a junction number, because it is equal to n+sod(n) for n = 1307099 and 1307108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307123) 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 3 ways as a sum of consecutive naturals, for example, 123 + ... + 1621.

2^1307128 is an apocalyptic number.

It is an amenable number.

1307128 is a deficient number, since it is larger than the sum of its proper divisors (1167872).

1307128 is a wasteful number, since it uses less digits than its factorization.

1307128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1307128 is about 1143.2969867886. The cubic root of 1307128 is about 109.3383978750.

Subtracting 1307128 from its reverse (8217031), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1307128 in words is "one million, three hundred seven thousand, one hundred twenty-eight".