1272826140 has 96 divisors (see below), whose sum is σ = 3662487360. Its totient is φ = 330086400.

The previous prime is 1272826073. The next prime is 1272826147. The reversal of 1272826140 is 416282721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272826147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1035046 + ... + 1036274.

It is an arithmetic number, because the mean of its divisors is an integer number (38150910).

Almost surely, 2^1272826140 is an apocalyptic number.

1272826140 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 1272826140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831243680).

1272826140 is an abundant number, since it is smaller than the sum of its proper divisors (2389661220).

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

1272826140 is a wasteful number, since it uses less digits than its factorization.

1272826140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 1272826140 is about 35676.6890279914. The cubic root of 1272826140 is about 1083.7348232317.

The spelling of 1272826140 in words is "one billion, two hundred seventy-two million, eight hundred twenty-six thousand, one hundred forty".