1271406064 has 80 divisors (see below), whose sum is σ = 2691390240. Its totient is φ = 579461120.

The previous prime is 1271406061. The next prime is 1271406067. The reversal of 1271406064 is 4606041721.

It is an interprime number because it is at equal distance from previous prime (1271406061) and next prime (1271406067).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271406061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1928967 + ... + 1929625.

It is an arithmetic number, because the mean of its divisors is an integer number (33642378).

Almost surely, 2^1271406064 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 1271406064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345695120).

1271406064 is an abundant number, since it is smaller than the sum of its proper divisors (1419984176).

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

1271406064 is a wasteful number, since it uses less digits than its factorization.

1271406064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1271406064 is about 35656.7814587913. The cubic root of 1271406064 is about 1083.3316368468.

Adding to 1271406064 its reverse (4606041721), we get a palindrome (5877447785).

The spelling of 1271406064 in words is "one billion, two hundred seventy-one million, four hundred six thousand, sixty-four".