1265128 has 8 divisors (see below), whose sum is σ = 2372130. Its totient is φ = 632560.

The previous prime is 1265119. The next prime is 1265129. The reversal of 1265128 is 8215621.

It can be written as a sum of positive squares in only one way, i.e., 777924 + 487204 = 882^2 + 698^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1265129) by changing a digit.

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 as a sum of consecutive naturals, namely, 79063 + ... + 79078.

2^1265128 is an apocalyptic number.

It is an amenable number.

1265128 is a deficient number, since it is larger than the sum of its proper divisors (1107002).

1265128 is a wasteful number, since it uses less digits than its factorization.

1265128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158147 (or 158143 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1265128 is about 1124.7790894216. The cubic root of 1265128 is about 108.1545569457.

The spelling of 1265128 in words is "one million, two hundred sixty-five thousand, one hundred twenty-eight".