1272728 has 16 divisors (see below), whose sum is σ = 2490480. Its totient is φ = 608608.

The previous prime is 1272679. The next prime is 1272749. The reversal of 1272728 is 8272721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272728.

It is a congruent number.

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, 3275 + ... + 3642.

It is an arithmetic number, because the mean of its divisors is an integer number (155655).

2^1272728 is an apocalyptic number.

It is an amenable number.

1272728 is a deficient number, since it is larger than the sum of its proper divisors (1217752).

1272728 is a wasteful number, since it uses less digits than its factorization.

1272728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946 (or 6942 counting only the distinct ones).

The product of its digits is 3136, while the sum is 29.

The square root of 1272728 is about 1128.1524719647. The cubic root of 1272728 is about 108.3706969082.

The spelling of 1272728 in words is "one million, two hundred seventy-two thousand, seven hundred twenty-eight".