1262280128 has 56 divisors (see below), whose sum is σ = 2577388800. Its totient is φ = 613064448.

The previous prime is 1262280119. The next prime is 1262280133. The reversal of 1262280128 is 8210822621.

It is a super-2 number, since 2×1262280128² = 3186702243087392768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1262280094 and 1262280103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416603 + ... + 419621.

It is an arithmetic number, because the mean of its divisors is an integer number (46024800).

Almost surely, 2^1262280128 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 1262280128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288694400).

1262280128 is an abundant number, since it is smaller than the sum of its proper divisors (1315108672).

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

1262280128 is a wasteful number, since it uses less digits than its factorization.

1262280128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217 (or 3207 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1262280128 is about 35528.5818461700. The cubic root of 1262280128 is about 1080.7334204365.

The spelling of 1262280128 in words is "one billion, two hundred sixty-two million, two hundred eighty thousand, one hundred twenty-eight".