1275428 has 48 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 480000.

The previous prime is 1275401. The next prime is 1275437. The reversal of 1275428 is 8245721.

It is a self number, because there is not a number n which added to its sum of digits gives 1275428.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12578 + ... + 12678.

It is an arithmetic number, because the mean of its divisors is an integer number (59976).

2^1275428 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 1275428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439424).

1275428 is an abundant number, since it is smaller than the sum of its proper divisors (1603420).

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

1275428 is a wasteful number, since it uses less digits than its factorization.

1275428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 162 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 1275428 is about 1129.3484847468. The cubic root of 1275428 is about 108.4472763016.

It can be divided in two parts, 127 and 5428, that added together give a palindrome (5555).

The spelling of 1275428 in words is "one million, two hundred seventy-five thousand, four hundred twenty-eight".