1205128 has 16 divisors (see below), whose sum is σ = 2284380. Its totient is φ = 595968.

The previous prime is 1205123. The next prime is 1205159. The reversal of 1205128 is 8215021.

1205128 is a nontrivial binomial coefficient, being equal to C(1553, 2).

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 77284 = 1062^2 + 278^2 .

It is not an unprimeable number, because it can be changed into a prime (1205123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 1552.

2^1205128 is an apocalyptic number.

1205128 is the 1552-nd triangular number.

1205128 is the 518-th centered nonagonal number.

It is an amenable number.

1205128 is a deficient number, since it is larger than the sum of its proper divisors (1079252).

1205128 is a wasteful number, since it uses less digits than its factorization.

1205128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1205128 is about 1097.7832208592. The cubic root of 1205128 is about 106.4170116203.

The spelling of 1205128 in words is "one million, two hundred five thousand, one hundred twenty-eight".