1275971928 has 192 divisors, whose sum is σ = 4123941120. Its totient is φ = 319603200.

The previous prime is 1275971927. The next prime is 1275971951. The reversal of 1275971928 is 8291795721.

It is a super-2 number, since 2×1275971928² = 3256208722088074368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275971927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1553758 + ... + 1554578.

It is an arithmetic number, because the mean of its divisors is an integer number (21478860).

Almost surely, 2^1275971928 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 1275971928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2061970560).

1275971928 is an abundant number, since it is smaller than the sum of its proper divisors (2847969192).

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

1275971928 is a wasteful number, since it uses less digits than its factorization.

1275971928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 873 counting only the distinct ones).

The product of its digits is 635040, while the sum is 51.

The square root of 1275971928 is about 35720.7492642582. The cubic root of 1275971928 is about 1084.6269050681.

The spelling of 1275971928 in words is "one billion, two hundred seventy-five million, nine hundred seventy-one thousand, nine hundred twenty-eight".