1296728 has 8 divisors (see below), whose sum is σ = 2431380. Its totient is φ = 648360.

The previous prime is 1296727. The next prime is 1296749. The reversal of 1296728 is 8276921.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81038 + ... + 81053.

2^1296728 is an apocalyptic number.

It is an amenable number.

1296728 is a deficient number, since it is larger than the sum of its proper divisors (1134652).

1296728 is a wasteful number, since it uses less digits than its factorization.

1296728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162097 (or 162093 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 1296728 is about 1138.7396541791. The cubic root of 1296728 is about 109.0476463133.

The spelling of 1296728 in words is "one million, two hundred ninety-six thousand, seven hundred twenty-eight".