1271313078 has 128 divisors (see below), whose sum is σ = 3111229440. Its totient is φ = 338688000.

The previous prime is 1271313059. The next prime is 1271313097. The reversal of 1271313078 is 8703131721.

It is an interprime number because it is at equal distance from previous prime (1271313059) and next prime (1271313097).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 5275038 + ... + 5275278.

It is an arithmetic number, because the mean of its divisors is an integer number (24306480).

Almost surely, 2^1271313078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271313078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555614720).

1271313078 is an abundant number, since it is smaller than the sum of its proper divisors (1839916362).

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

1271313078 is a wasteful number, since it uses less digits than its factorization.

1271313078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 1271313078 is about 35655.4775315098. The cubic root of 1271313078 is about 1083.3052258953.

Adding to 1271313078 its reverse (8703131721), we get a palindrome (9974444799).

The spelling of 1271313078 in words is "one billion, two hundred seventy-one million, three hundred thirteen thousand, seventy-eight".