1273728 has 64 divisors (see below), whose sum is σ = 3525120. Its totient is φ = 407040.

The previous prime is 1273721. The next prime is 1273729. The reversal of 1273728 is 8273721.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1273695 and 1273704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11851 + ... + 11957.

It is an arithmetic number, because the mean of its divisors is an integer number (55080).

2^1273728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762560).

1273728 is an abundant number, since it is smaller than the sum of its proper divisors (2251392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1273728 is a wasteful number, since it uses less digits than its factorization.

1273728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 143 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 1273728 is about 1128.5955874449. The cubic root of 1273728 is about 108.3990722632.

It can be divided in two parts, 12 and 73728, that multiplied together give a cube (884736 = 96³).

The spelling of 1273728 in words is "one million, two hundred seventy-three thousand, seven hundred twenty-eight".