1275428000 has 384 divisors, whose sum is σ = 4041902592. Its totient is φ = 384000000.

The previous prime is 1275427997. The next prime is 1275428023. The reversal of 1275428000 is 8245721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12627950 + ... + 12628050.

It is an arithmetic number, because the mean of its divisors is an integer number (10525788).

Almost surely, 2^1275428000 is an apocalyptic number.

1275428000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275428000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020951296).

1275428000 is an abundant number, since it is smaller than the sum of its proper divisors (2766474592).

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

1275428000 is a wasteful number, since it uses less digits than its factorization.

1275428000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 167 counting only the distinct ones).

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

The square root of 1275428000 is about 35713.1348385996. The cubic root of 1275428000 is about 1084.4727630163.

The spelling of 1275428000 in words is "one billion, two hundred seventy-five million, four hundred twenty-eight thousand".